Consider the parallelogram given. Find the values of the unknowns x, y, and z.
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Solution
In parallelogram ABCD, 100∘+x=180∘ [Adjacent angles in a parallelogram are supplementary] ⇒x=180∘−100∘=80∘
Also, z=x=80∘ [Opposite angles in a parallelogram are equal]
Also y=100∘ [Opposite angles in a parallelogram are equal]