In a parallelogram $ABCD$, determine the sum of angles $C$ and $D$.
Given:
A parallelogram $ABCD$.
To do:
We have to determine the sum of angles $C$ and $D$.
Solution:
We know that,
The Sum of two consecutive angles of a parallelogram is $180^o$.
Therefore,
$\angle C + \angle D = 180^o$.
Hence, the sum of angles $C$ and $D$ is $180^o$.
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