Question

If opposite angles of a rhombus PQRS are such that measure of angle P=(2x)° and measure of angle R = (3x - 40)° then find the measure of angle R.​

Answer 1

If opposite angles of a rhombus

P = R

$2x = 3x - 40 \\ x = 40$

Then Angle R :

$3 \times 40 - 40 = 120 - 40 = 80$