I removed the altitude in the new attached pic. I know that the internal angles of triangle ABC must equal 180 degrees. That's about as far as I could get. Perhaps I can arrive at the solution with auxillary questions. In the picture, I labeled most of the vectors with their respective angles...
Homework Statement
How does angle DAE equal a/2 + 90 degrees (a refers to the angle at vector A)? Please refer to the picture attached. Triangles ACE and ABD are isosceles. Side h bisects triangle ABC. Segment ED equals the perimeter of triangle ABC
Homework Equations
The Attempt...