In parallelogram $ABCD$ with $\angle A : \angle B = 2:3$, $\angle A$ equals

In parallelogram $ABCD$ with $\angle A : \angle B = 2:3$, $\angle A$ equals
  1. $72^{\circ}$
  2. $108^{\circ}$
  3. $60^{\circ}$
  4. $90^{\circ}$

Solution

$2k + 3k = 180 \Rightarrow k = 36$. $\angle A = 72^{\circ}$.

Asked in: MH-SSC-9

Practice more Quadrilaterals questions on Aicharya