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Question
The following figure is parallelogram. Find the degree values of the unknown x, y, z.
Solution
\[ x = 90° (\text{ vertically opposite angle })\]
\[\text{ Sum of all angles in a triangle is } {180}^°. \]
\[ \therefore y + 90°+ 30° = 180°\]
\[y = 180°- (90°+ 30°) = 60°\]
\[y = z = 60° (\text{ alternate angles })\]
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