perplexus.info :: Geometry : Measure that angle IV

Measure that angle IV (Posted on 2004-11-02)

Triangle ABC is isosceles with AB=AC. Point D is on side AB such that angle BCD is 70 degrees. Point E is on side AC such that angle EBC is 60 degrees. Angle ABE equals 20 degrees, and angle DCE equals 10 degrees.

Find angle EDC. Justify your answer.

See The Solution Submitted by Brian Smith

Rating: 3.6667 (9 votes)

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re: Not sure why I don't get the same answer

| Comment 17 of 21 |

(In reply to Not sure why I don't get the same answer by Jils)

"By similar triangles DE=DA/BA."

Isn't it DG = DA/BA, as DG is the one that's horizontal, parallel to BC?

Posted by Charlie on 2004-11-09 16:06:21

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