Berthin Alexander
New member
- Joined
- Jun 16, 2020
- Messages
- 14
I got 0=0The interior angles of a quadrilateral have a sum of 360 degrees. So if you can find an expression for <EDC, you can form an equation. Does that help?
thank you very much for uploading your solution. it's very interesting and coolThere doesn't seem to have been any progress, so at least here is a trigonometric method for anyone interested. I'm sure there's a much nicer geometric method!
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