How to reconstruct a quadrilateral farm to a triangular one with the same area?

作者:
Terry Tam
主題:
面積
1. Given a quadrilateral farm ABCD, with its area unknown, how to reconstruct a new triangular one with a common edge which has the same area of ABCD? 2. How many such triangular farms can be reconstructed for a given quadrilateral farm? 3. How about the quadrilateral is concave?