Question

Find the area of a rhombus with a 120 degree angle and sides 10 cm

Answer 1

A = 50√3 cm²

Explanation:

`A=s^2\cdot \sin\alpha\\\\s=10\\\alpha=120^o\\\\A=10^2\cdot\sin(120^o)=100\sin(180^o-60^o)=100\sin(60^o)=100\cdot\frac{\sqrt3}2=50\sqrt3`