perplexus.info :: Geometry : Angle Trisection

Angle Trisection (Posted on 2006-11-09)

ΔABC is equilateral. Point D lies on line BC such that C lies between B and D. Point E lies on side AC such that ED bisects angle ADC. Point F lies on side AB such that FE and BC are parallel. Point G lies on side BC such that GF=EF.

Prove that angle DAC equals twice angle GAC.

See The Solution Submitted by Bractals

Rating: 2.5000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

re(2): 'Dis Proof. The mistake

| Comment 4 of 6 |

(In reply to re: 'Dis Proof. The mistake by Jer)

Oops; I misread this as GF = GE. Thanks, Jer

Posted by Steve Herman on 2006-11-11 10:47:29

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