Geometry Proving Problem
Geometry
Level
3
True or false:
In a triangle \( ABC\), \(\angle A = 2\angle B\). Let \(a,b\) and \(c\) denote the lengths of the sides of \(BC, CA\) and \(AB\) respectively. Then the equation \(a^2=b(b+c) \) must be fulfilled.
by
Jerry Han Jia Tao