SECTION 2.2Angle Bisectors

LEARNING TARGETS:1. I will be able to identify angle bisectors.2. I will be able to find angle measures using the angle bisector.

VOCBAULARYAngle Bisector

Activity 2.2

QUESTION:

How can you bisect an angle?

MATERIALS:

Protractor

Straightedge

Page 60 in Textbook

Activity 2.2

Activity 2.2

Activity 2.2

Activity 2.2

Angle Bisector

ANGLE BISECTOR: A ray that divides an angle into two angles that

are congruent.

BD is an angle bisector

DB is an angle bisector.

Example (Notes)

NQ bisects ∠ MNP. m∠ MNP = 74°. Find m∠ MNQ

and m∠ PNQ.

m∠ MNQ =

m∠ PNQ =

Example (Textbook)

m∠ ABD =

m∠ DBC =

Example (Notes)

AB bisects ∠ FAH. m∠ BAF=38°

m∠ HAB =

m∠ FAH=

Classify ∠ FAH:

Example (Notes)

GJ bisects ∠ FGH. Find the

value of x.

x =

Example (Notes)

AD bisects ∠ CAT. Find the angle measure.

m∠ CAD = __________ m∠ DAT = _________

Example (Notes)

OH bisects ∠ DOG. Find x.

Example (Notes)

OH bisects ∠ DOG. Find x.

Example (Notes)Use the figure at the right to complete the

statements.

Example (Textbook)

Cooperative Learning

Angle Bisector Worksheet

HOMEWORKSection 2.2 Assignment

Page 64 #8-26, 28-30, and 33

Due Wednesday, 10/19