The larger angles of a rhombus are twice the smaller angle of the rhombus. If the shorter diagonal is 20, find the perimeter of the rhombus.

Answer 1

If you draw the rhombus, you will see that the angles are 60° and 120°.

Since the diagonals bisect the angles, the shorter diagonal forms two equilateral triangles.

So, each side is 20, and the perimeter is 80.

Answer 2

A rhombus has 240cm