Tuesday, October 27, 2009

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

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

Problem 376: Triangle, Excenter, Internal and External Angle Bisectors.
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Complete Geometry Problem 376
Level: High School, SAT Prep

Posted by Antonio Gutierrez at 8:30 PM
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2 comments:

  1. VihaanOctober 30, 2009 at 11:08 PM

    External angle C = 180 - angle C
    From tr. ACE, angle α =(180-angle C)/2 -A/2 =(180- A -C)/2 = angle B/2
    Vihaan:vihaanup@gmail.com

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  2. vijay9290009015November 18, 2009 at 9:16 PM

    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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