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Question

In the above figure RISK and CLUE are parallelograms, Find the value of x.
1503761_0c55b8e44a284118ae91efdbb81ca259.png

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Solution

Adjacent angles of a parallelogram are supplementary.

In parallelogram RISK,RKS+ISK=180

120+ISK=180

ISK=60

Also, opposite angles of a parallelogram are equal.

In parallelogram CLUE,ULC=CEU=70

The sum of the measures of all the interior angles of a triangle is 180.

x+60+70=180
x+130=180
x=180130

x=50

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