Question

Given below is a parallelogram $ABCD$. Complete each statement along with the definition or property used.

$\left(iv\right)$ $\angle DAB+\angle CDA=?$​

Answer 1

Given : $ABCD$ is a parallelogram
We know that,
In a parallelogram, sum of any two adjacent
angles is ${180}^{\circ }$.

In the given figure,
$\angle DAB$ and $\angle ADC$ are adjacent angles of
parallelogram ABCD

$\Rightarrow \angle DAB+\angle CDA={180}^{\circ }$

Therefore, $\angle DAB+\angle CDA={180}^{\circ }$.