SIMILARITY IN TRIANGLES THEOREMS CCGPS STANDARDS MCC 9
![SIMILARITY IN TRIANGLES & THEOREMS SIMILARITY IN TRIANGLES & THEOREMS](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-1.jpg)
![CCGPS STANDARDS MCC 9 -12. G. SRT. 2 Given two figures, use the definition CCGPS STANDARDS MCC 9 -12. G. SRT. 2 Given two figures, use the definition](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-2.jpg)
![CCGPS STANDARDS MCC 9 -12. G. SRT. 4 Prove theorems about triangles. Theorems include: CCGPS STANDARDS MCC 9 -12. G. SRT. 4 Prove theorems about triangles. Theorems include:](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-3.jpg)
![ESSENTIAL QUESTION What strategies can I use to determine missing side lengths and areas ESSENTIAL QUESTION What strategies can I use to determine missing side lengths and areas](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-4.jpg)
![In geometry, two triangles are similar when one is a replica (scale model) of In geometry, two triangles are similar when one is a replica (scale model) of](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-5.jpg)
![Consider Dr. Evil and Mini Me from Mike Meyers’ hit movie Austin Powers. Mini Consider Dr. Evil and Mini Me from Mike Meyers’ hit movie Austin Powers. Mini](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-6.jpg)
![BACK NEXT EXIT BACK NEXT EXIT](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-7.jpg)
![How do we know if triangles are similar or proportional? s! id I p How do we know if triangles are similar or proportional? s! id I p](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-8.jpg)
![Triangles are similar (~) if corresponding angles are equal and the ratios of the Triangles are similar (~) if corresponding angles are equal and the ratios of the](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-9.jpg)
![Congruent Angles and Proportional Sides A D E B C ABC DEF F Proportional Congruent Angles and Proportional Sides A D E B C ABC DEF F Proportional](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-10.jpg)
![Similarity in Triangles Angle-Angle Similarity Postulate (AA~)- If two angles of one triangle are Similarity in Triangles Angle-Angle Similarity Postulate (AA~)- If two angles of one triangle are](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-11.jpg)
![Similarity in Triangles Side-Angle-Side Similarity Postulate (SAS~)If an angle of one triangle is congruent Similarity in Triangles Side-Angle-Side Similarity Postulate (SAS~)If an angle of one triangle is congruent](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-12.jpg)
![Similarity in Triangles Side-Side Similarity Postulate (SSS~)- If the corresponding sides of two triangles Similarity in Triangles Side-Side Similarity Postulate (SSS~)- If the corresponding sides of two triangles](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-13.jpg)
![Are the following triangles similar? If so, what similarity statement can be made. Name Are the following triangles similar? If so, what similarity statement can be made. Name](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-14.jpg)
![Are the following triangles similar? If so, what similarity statement can be made. Name Are the following triangles similar? If so, what similarity statement can be made. Name](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-15.jpg)
![Are the following triangles similar? If so, what similarity statement can be made. Name Are the following triangles similar? If so, what similarity statement can be made. Name](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-16.jpg)
![Are the following triangles similar? If so, what similarity statement can be made. Name Are the following triangles similar? If so, what similarity statement can be made. Name](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-17.jpg)
![Explain why these triangles are similar. Then find the value of x. 4. 5 Explain why these triangles are similar. Then find the value of x. 4. 5](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-18.jpg)
![Explain why these triangles are similar. Then find the value of x. 5 x Explain why these triangles are similar. Then find the value of x. 5 x](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-19.jpg)
![Explain why these triangles are similar. Then find the value of x. x 24 Explain why these triangles are similar. Then find the value of x. x 24](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-20.jpg)
![Explain why these triangles are similar. Then find the value of x. 6 9 Explain why these triangles are similar. Then find the value of x. 6 9](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-21.jpg)
![Explain why these triangles are similar. Then find the value of x. 4 5 Explain why these triangles are similar. Then find the value of x. 4 5](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-22.jpg)
![Explain why these triangles are similar. Then find the value of x. x 7. Explain why these triangles are similar. Then find the value of x. x 7.](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-23.jpg)
![Please complete the Ways to Prove Triangles Similar Worksheet. Please complete the Ways to Prove Triangles Similar Worksheet.](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-24.jpg)
![Similarity in Triangles Side Splitter Theorem Triangle Proptionality Theorem - If a line is Similarity in Triangles Side Splitter Theorem Triangle Proptionality Theorem - If a line is](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-25.jpg)
![T x S 16 R 5 U 10 V Segment Addition Postulate TS + T x S 16 R 5 U 10 V Segment Addition Postulate TS +](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-26.jpg)
![Theorem If three parallel lines intersect two transversals, then the segments intercepted are proportional. Theorem If three parallel lines intersect two transversals, then the segments intercepted are proportional.](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-27.jpg)
![Theorem Triangle Angle Bisector Theorem -If a ray bisects an angle of a triangle, Theorem Triangle Angle Bisector Theorem -If a ray bisects an angle of a triangle,](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-28.jpg)
![Complete the practice sheets. Complete the practice sheets.](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-29.jpg)
- Slides: 29
![SIMILARITY IN TRIANGLES THEOREMS SIMILARITY IN TRIANGLES & THEOREMS](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-1.jpg)
SIMILARITY IN TRIANGLES & THEOREMS
![CCGPS STANDARDS MCC 9 12 G SRT 2 Given two figures use the definition CCGPS STANDARDS MCC 9 -12. G. SRT. 2 Given two figures, use the definition](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-2.jpg)
CCGPS STANDARDS MCC 9 -12. G. SRT. 2 Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides. MCC 9 -12. G. SRT. 3 Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.
![CCGPS STANDARDS MCC 9 12 G SRT 4 Prove theorems about triangles Theorems include CCGPS STANDARDS MCC 9 -12. G. SRT. 4 Prove theorems about triangles. Theorems include:](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-3.jpg)
CCGPS STANDARDS MCC 9 -12. G. SRT. 4 Prove theorems about triangles. Theorems include: a line parallel to one side of a triangle divides the other two proportionally, and conversely; the Pythagorean Theorem proved using triangle similarity. MCC 9 -12. G. SRT. 5 Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.
![ESSENTIAL QUESTION What strategies can I use to determine missing side lengths and areas ESSENTIAL QUESTION What strategies can I use to determine missing side lengths and areas](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-4.jpg)
ESSENTIAL QUESTION What strategies can I use to determine missing side lengths and areas of similar figures? How do I know which method to use to prove two triangles similar?
![In geometry two triangles are similar when one is a replica scale model of In geometry, two triangles are similar when one is a replica (scale model) of](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-5.jpg)
In geometry, two triangles are similar when one is a replica (scale model) of the other. BACK NEXT EXIT
![Consider Dr Evil and Mini Me from Mike Meyers hit movie Austin Powers Mini Consider Dr. Evil and Mini Me from Mike Meyers’ hit movie Austin Powers. Mini](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-6.jpg)
Consider Dr. Evil and Mini Me from Mike Meyers’ hit movie Austin Powers. Mini Me is supposed to be an exact replica of Dr. Evil. BACK NEXT EXIT
![BACK NEXT EXIT BACK NEXT EXIT](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-7.jpg)
BACK NEXT EXIT
![How do we know if triangles are similar or proportional s id I p How do we know if triangles are similar or proportional? s! id I p](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-8.jpg)
How do we know if triangles are similar or proportional? s! id I p Oo w d re? Ho t he ge BACK NEXT EXIT
![Triangles are similar if corresponding angles are equal and the ratios of the Triangles are similar (~) if corresponding angles are equal and the ratios of the](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-9.jpg)
Triangles are similar (~) if corresponding angles are equal and the ratios of the lengths of corresponding sides are equal. BACK NEXT EXIT
![Congruent Angles and Proportional Sides A D E B C ABC DEF F Proportional Congruent Angles and Proportional Sides A D E B C ABC DEF F Proportional](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-10.jpg)
Congruent Angles and Proportional Sides A D E B C ABC DEF F Proportional sides have a constant ratio – known as a scale factor or ratio of similitude. A D B E C F AB BC AC = = DE EF DF
![Similarity in Triangles AngleAngle Similarity Postulate AA If two angles of one triangle are Similarity in Triangles Angle-Angle Similarity Postulate (AA~)- If two angles of one triangle are](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-11.jpg)
Similarity in Triangles Angle-Angle Similarity Postulate (AA~)- If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar. W 45 R S 45 B V WRS BVS because of the AA~ Postulate.
![Similarity in Triangles SideAngleSide Similarity Postulate SASIf an angle of one triangle is congruent Similarity in Triangles Side-Angle-Side Similarity Postulate (SAS~)If an angle of one triangle is congruent](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-12.jpg)
Similarity in Triangles Side-Angle-Side Similarity Postulate (SAS~)If an angle of one triangle is congruent to an angle of a second triangle, and the sides including the angles are proportional, then the triangles are similar. 16 C T 32 28 12 E U P 21 TEA CUP because of the SAS~ A Postulate. The scale factor is 4: 3.
![Similarity in Triangles SideSide Similarity Postulate SSS If the corresponding sides of two triangles Similarity in Triangles Side-Side Similarity Postulate (SSS~)- If the corresponding sides of two triangles](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-13.jpg)
Similarity in Triangles Side-Side Similarity Postulate (SSS~)- If the corresponding sides of two triangles are proportional, then the triangles are similar. A 30 15 B C Q 20 ABC QRS 3 because of the SSS~ R S Postulate. 4 The scale factor is 1: 5. 6
![Are the following triangles similar If so what similarity statement can be made Name Are the following triangles similar? If so, what similarity statement can be made. Name](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-14.jpg)
Are the following triangles similar? If so, what similarity statement can be made. Name the postulate or theorem you used. F J H G K Yes, FGH KJH because of the AA~ Postulate
![Are the following triangles similar If so what similarity statement can be made Name Are the following triangles similar? If so, what similarity statement can be made. Name](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-15.jpg)
Are the following triangles similar? If so, what similarity statement can be made. Name the postulate or theorem you used. M 6 O G 3 H R 10 No, these are not similar because 4 I
![Are the following triangles similar If so what similarity statement can be made Name Are the following triangles similar? If so, what similarity statement can be made. Name](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-16.jpg)
Are the following triangles similar? If so, what similarity statement can be made. Name the postulate or theorem you used. A 20 X 25 25 Y 30 B No, these are not similar because C
![Are the following triangles similar If so what similarity statement can be made Name Are the following triangles similar? If so, what similarity statement can be made. Name](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-17.jpg)
Are the following triangles similar? If so, what similarity statement can be made. Name the postulate or theorem you used. A 2 3 P 5 B J 3 3 8 C Yes, APJ ABC because of the SSS~ Postulate.
![Explain why these triangles are similar Then find the value of x 4 5 Explain why these triangles are similar. Then find the value of x. 4. 5](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-18.jpg)
Explain why these triangles are similar. Then find the value of x. 4. 5 5 x 3 These 2 triangles are similar because of the AA~ Postulate. x=7. 5
![Explain why these triangles are similar Then find the value of x 5 x Explain why these triangles are similar. Then find the value of x. 5 x](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-19.jpg)
Explain why these triangles are similar. Then find the value of x. 5 x 70 3 110 3 These 2 triangles are similar because of the AA~ Postulate. x=2. 5
![Explain why these triangles are similar Then find the value of x x 24 Explain why these triangles are similar. Then find the value of x. x 24](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-20.jpg)
Explain why these triangles are similar. Then find the value of x. x 24 14 22 These 2 triangles are similar because of the AA~ Postulate. x=12
![Explain why these triangles are similar Then find the value of x 6 9 Explain why these triangles are similar. Then find the value of x. 6 9](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-21.jpg)
Explain why these triangles are similar. Then find the value of x. 6 9 2 x These 2 triangles are similar because of the AA~ Postulate. x= 12
![Explain why these triangles are similar Then find the value of x 4 5 Explain why these triangles are similar. Then find the value of x. 4 5](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-22.jpg)
Explain why these triangles are similar. Then find the value of x. 4 5 x 15 These 2 triangles are similar because of the AA~ Postulate. x=8
![Explain why these triangles are similar Then find the value of x x 7 Explain why these triangles are similar. Then find the value of x. x 7.](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-23.jpg)
Explain why these triangles are similar. Then find the value of x. x 7. 5 12 18 These 2 triangles are similar because of the AA~ Postulate. x= 15
![Please complete the Ways to Prove Triangles Similar Worksheet Please complete the Ways to Prove Triangles Similar Worksheet.](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-24.jpg)
Please complete the Ways to Prove Triangles Similar Worksheet.
![Similarity in Triangles Side Splitter Theorem Triangle Proptionality Theorem If a line is Similarity in Triangles Side Splitter Theorem Triangle Proptionality Theorem - If a line is](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-25.jpg)
Similarity in Triangles Side Splitter Theorem Triangle Proptionality Theorem - If a line is parallel to one side of a triangle and intersects the other You can either two sides, then it divides those sides use T proportionally. x or S 16 R 5 U 10 V
![T x S 16 R 5 U 10 V Segment Addition Postulate TS T x S 16 R 5 U 10 V Segment Addition Postulate TS +](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-26.jpg)
T x S 16 R 5 U 10 V Segment Addition Postulate TS + SR = TR TU + UV = TV
![Theorem If three parallel lines intersect two transversals then the segments intercepted are proportional Theorem If three parallel lines intersect two transversals, then the segments intercepted are proportional.](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-27.jpg)
Theorem If three parallel lines intersect two transversals, then the segments intercepted are proportional. c d a b
![Theorem Triangle Angle Bisector Theorem If a ray bisects an angle of a triangle Theorem Triangle Angle Bisector Theorem -If a ray bisects an angle of a triangle,](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-28.jpg)
Theorem Triangle Angle Bisector Theorem -If a ray bisects an angle of a triangle, then it divides the opposite side on the triangle into two segments that are proportional to the other two sides of the triangle. A C D B
![Complete the practice sheets Complete the practice sheets.](https://slidetodoc.com/presentation_image_h/0045ba39b0e258a690d6dc7697079190/image-29.jpg)
Complete the practice sheets.
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