Section 8 3 Similar Polygons Similar Figures Two
- Slides: 17
Section 8. 3 Similar Polygons
Similar Figures • Two figures that have the same shape are similar –Not necessarily the same size! –Enlarging and shrinking
Real life example of Similarity
Similar Polygons • Two polygons are similar if: – corresponding angles have the same measure – corresponding sides are in proportion – Symbolic notation for similarity: ~
Congruent vs. Similar
Congruence Similarity Figures are the exact same size and shape Corresponding sides are equal Corresponding angles are equal Figures have the same shape but not necessarily the same size. Corresponding sides are in proportion Corresponding angles are equal Similarities Both have corresponding angles that are equal. Same shape of the object Both have a symbolic notation
Example of Similar Polygons Similarity Statement of Proportionality ABCD ~ EFGH ____ = _____ =_____=_____
How to determine similarity: • Are corresponding angles equal? • Are corresponding sides in proportion? –Are the ratios the same?
Are they similar?
Are they similar?
Scale Factor • Ratio of the lengths of two corresponding sides of similar figures. • Corresponding sides change by the same scale factor. –What does this mean?
It means that all the sides of the small figure are multiplied by the same number to obtain the lengths of the corresponding sides of the large figure.
Find the scale factor.
Find the scale factor.
- Congruent and similar shapes
- Are all congruent figures similar
- Two polygons are similar if
- If two polygons are similar the corresponding angles are
- 7-2 similar polygons
- Similar
- Similar figures definition in math
- Lesson 11-4 areas of regular polygons and composite figures
- 11-4 area of regular polygons
- Which figures are polygons
- Closed plane figure formed by three or more segments
- Similar polygons definition
- Similar polygons in real life
- 8-2 similar polygons
- Determine whether each pair of polygons is similar
- Gihf meaning
- What are similar polygons
- In the diagram triangle tpr