perplexus.info :: Geometry : Measure that angle V

Measure that angle V (Posted on 2005-10-24)

A certain triangle ABC has D on AB and E on AC such that AD=DB=BC=CE and AE=ED. What is the measure of angle BAC?

See The Solution Submitted by Brian Smith

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SO WHAT- spoiler

| Comment 1 of 8

sin(BAC/2)=1/4

sin(BAC)=2*1/4*sqrt(15/16)=.4841

BAC=arcsin (.4841 ) WHATEVER IT IS , LESS THAN 30º

SO WHAT

Posted by Ady TZIDON on 2005-10-24 13:44:33

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