perplexus.info :: Geometry : Measure that angle III

Measure that angle III (Posted on 2004-09-07)

Triangle ABC has side AB=AC, and angle BAC = 20 degrees.

D is a point on side AC with AD=BC. Find angle DBC.

Solve this without trigonometry.

See The Solution Submitted by Brian Smith

Rating: 3.2000 (5 votes)

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re(2): Solution by cheating

| Comment 13 of 25 |

(In reply to re: Solution by cheating by Brian Smith)

Wait a minute... Am I missing something?

You picked E so that AD=DE. And we know that AD = BC. But how do you know DE=EB?

Posted by Ken Haley on 2004-09-08 23:12:16

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