Lesson 2.2 Angle Bisectors

Pages 61 - 63

What is an ‘angle bisector’?

• An angle bisector is a ray that divides an angle into two angles that are congruent.

Example 1: Find the missing angle measures.

A

BM

m AMC = ______

m CMB = ______

N

RM

m RQN = ______

m MQN = ______

Q

35⁰C110⁰

Example 2: Find the missing angle measures then classify the angles as acute, right, obtuse, or straight.

Z

Y

X

W 62⁰m YXZ = ______

m WXZ = ______

Classify YXZ.

Classify WXZ.

Example 3: Find the missing angle measures.

45⁰ X

60⁰

Example 4: Use Algebra to find the missing angle measures.

ABM

X = ______

N

RM

X = ______

m MQR = ______

Q

9X

C

6X+185⁰ 8X + 3

Assignment:

Pages 64 - 66#2 – 22 even, 28, 30