Proposed Problem

Click the figure below to see the complete problem 376 about Triangle, Excenter, Internal and External Angle Bisectors.

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Complete Geometry Problem 376

Level: High School, SAT Prep

## Tuesday, October 27, 2009

### Problem 376: Triangle, Excenter, Internal and External Angle Bisectors

Labels:
angle bisector,
excenter,
triangle

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External angle C = 180 - angle C

ReplyDeleteFrom tr. ACE, angle α =(180-angle C)/2 -A/2 =(180- A -C)/2 = angle B/2

Vihaan:vihaanup@gmail.com

alpha=180-(angleEAC+angleECA)= 180-(A/2+C+90-C/2)=180-A/2-90-C/2=90-A/2-C/2=B/2

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