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Measure that angle IV (Posted on 2004-11-02) Difficulty: 4 of 5
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)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(5): Just following the rules | Comment 12 of 21 |
(In reply to re(4): Just following the rules by bob909)

Opps, did it again....

There are is the angle w in the upper triangle that will get to 90 before y does. When w = 90, z = 60.

So my revised and hopefully final answer is 60 < EDC < 70.



  Posted by bob909 on 2004-11-04 17:32:13

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