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.

Submitted by Brian Smith

Rating: 3.6667 (9 votes)

Solution: (Hide)

Charlie offers a solution here.
WryTangle offers a more analytic solution here.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Answer	K Sengupta	2008-10-26 01:58:21
There is only one solution	WryTangle	2004-12-01 04:42:29
re(2): Not sure why I don't get the same answer	Jils	2004-11-11 08:43:30
re(2): Generalization	Bractals	2004-11-09 20:03:18
re: Not sure why I don't get the same answer	Charlie	2004-11-09 16:06:21
re: Generalization	Jils	2004-11-09 15:05:00
Generalization	Bractals	2004-11-06 14:28:55
Not sure why I don't get the same answer	Jils	2004-11-05 10:29:58
re(3): Just following the rules	Charlie	2004-11-04 19:17:21
re(5): Just following the rules	bob909	2004-11-04 17:32:13
re(4): Just following the rules	bob909	2004-11-04 17:07:07
re(3): Just following the rules	CeeAnne	2004-11-04 16:19:49
re(2): Just following the rules	bob909	2004-11-04 08:13:37
Neato Result	owl	2004-11-04 02:58:07
re: Just following the rules	CeeAnne	2004-11-03 20:19:51
Just following the rules	bob909	2004-11-03 19:44:18
Avoiding Drudgery	CeeAnne	2004-11-02 20:10:12
Part II, but still not finished re: Part of solution	Dustin	2004-11-02 19:18:08
Part of solution	Dustin	2004-11-02 18:52:30
Iterative Solution	Charlie	2004-11-02 18:36:54
spoiler?	Erik O.	2004-11-02 18:13:09

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