2 2 angle bisectors
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2.2 Angle Bisectors

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2.2 Angle Bisectors. Definitions. Angle bisector – a ray that divides and angle into two congruent angles. D. C. A. B. Find Angle Measures. BD bisects ABC and m ABC = 110˚ Find m ABD and m DBC. A. D. 110˚. B. C. Find Angle Measures and Classify.

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Presentation Transcript
definitions
Definitions
  • Angle bisector – a ray that divides and angle into two congruent angles

D

C

A

B

find angle measures
Find Angle Measures
  • BD bisects ABC and m ABC = 110˚
  • Find m ABD and m DBC

A

D

110˚

B

C

find angle measures and classify
Find Angle Measures and Classify
  • BD bisects ABD and ABD = 46˚
  • Find m DBC and m ABC

A

D

46˚

B

C

use angle bisectors
Use Angle Bisectors

A

  • DAB is bisected by __
  • m DAB = __
  • BCD is bisected by __
  • m BCD = __

45˚

D

B

27˚

C

use algebra with angle measures
Use Algebra with Angle Measures
  • RQ bisects PRS. Find x.
  • m PRQ = m QRS

Q

(6x + 1)˚

P

85˚

R

S

guided practice
Guided Practice
  • Pg. 64 #1-7
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