Question

Prove that in a rhombus with an angle of 60°, the shorter diagonal divides

the rhombus into two equilateral triangles.​

Answer 1

if if one of the diagonal is equal in measure to one of the side, the rhombus must be formed from two equivaleral triangles.

since, in equilateral triangle each angle of 60°

therefore, smaller angle are 60° , and the large angle must be two times 60 or 120 degrees .