ADJACENT VERTICAL SUPPLEMENTARY AND COMPLEMENTARY ANGLES Bell Ringer

ADJACENT, VERTICAL, SUPPLEMENTARY, AND COMPLEMENTARY ANGLES

Bell Ringer C

Textbook pick up Volunteer to distribute textbooks needed When your name is called, walk to the back of the room and take your textbook from the volunteer Write you name and the condition of your book on the front page Bring your book to class each day Do not lose your book, $80 fine will be incurred.

Bell Ringer (Honors) C

Homework Review Do you have any questions on the homework?

Adjacent angles are “side by side” and share a common ray. 45º 15º

These are examples of adjacent angles. 80º 45º 35º 55º 85º 130º 20º 50º

These angles are NOT adjacent. 100º 50º 35º 55º 45º

When 2 lines intersect, they make vertical angles. 75º 105º 75º

Vertical angles are opposite one another. 75º 105º 75º

Vertical angles are opposite one another. 75º 105º 75º

Vertical angles are congruent 150º 30º 150º

Congruence: ≅ Both similar and equal

Similar: ~ the only difference is the size. Angles are equal.

Supplementary angles add up to 180º. 40º 120º 60º Adjacent and Supplementary Angles 140º Supplementary Angles but not Adjacent

Complementary angles add up to 90º. 30º 40º 60º Adjacent and Complementary Angles 50º Complementary Angles but not Adjacent

Practice Time!

Practice Time! Directions: Identify each pair of angles as Vertical, Supplementary, Complementary, or None of the Above. (Write V, S, C, or NA) Below write A for Adjacent or N for Not adjacent Grab a whiteboard from onto of the yellow cabinet and a sock

#1 120º 60º

#1 120º 60º Supplementary Angles Adjacent

#2 30º 60º

#2 60º 30º Complementary Angles Not Adjacent

#3 75º

#3 Vertical Angles Not Adjacent 75º

#4 40º 60º

#4 60º 40º None of the above Not Adjacent

#5 60º

#5 60º Vertical Angles Not Adjacent

#6 135º 45º

#6 135º 45º Supplementary Angles Adjacent

#7 25º 65º

#7 25º 65º Complementary Angles Adjacent

#8 90º 50º

#8 90º 50º None of the above Not Adjacent

Directions: Write the missing angle on your whiteboard Raise whiteboard when prompted

#1 135º 45º

#2 25º 65º

#3 35º

#4 130º 50º

#5 140º

#6 50º 40º

In your Textbook Pages 31 -33 Questions: • 7 -10 • 12 -13 • 26 -32 Bonus Questions • 39 -46

Exit Ticket Draw a pair of adjacent supplementary angles and name the angles using the points A, B, C, and D. Make B the vertex for both angles

Exit Ticket State whether the following is true or false. If false, explain in a full sentence with academic language why. 1. If an angle is acute, then it has a complement which is obtuse. 2. If an angle is right, then it has a supplement that is also right and it has a complementary angle of zero degrees.