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Pradnesh
Posts:
1
From:
Mumbai
Registered:
8/20/17


Re: Euclidean problem
Posted:
Aug 20, 2017 7:11 AM



> Hi, > > I've some troubles trying to prove this problem: > > Given a square (ABCD) , E is an internal point to the > square such that the angle ECD = angle EDC = 15°; > prove that ABE is an equilateral triangle. > > I've just managed to prove that ABE is isosceles, but > can't move forward. Hope someone can help me figure > out the right path!
Hi,GabMat, I have a solution to your problem. Hope you are aware of the basic Trigonometry principles and the sine rule which states that In ?ABC a/sinA=b/sin B=c/sin C. You can find my solution in the attachments because it is difficult to type it. Let me know about it.



