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Question

Two opposite angles of a parallelogram are (3x − 2)° and (50 − x)°. Find the measure of each angle of the parallelogram.

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Solution

Oppostie angles of a parallelogram are congurent. 3x-2°=50-x°3x°-2°=50°-x°3x°+x°=50°+2°4x°=52°x°=13°Putting the value of x in one angle:3x°-2°=39°-2°=37°Opposite angles are congurent: 50-x°=37°Let the remaining two angles be y and z.Angles y and z are congurent because they are also opposite angles. y=zThe sum of adjacent angles of a parallelogram is equal to 180°.37°+y=180°y=180°-37°y=143°So, the anlges measure are:37°, 37°, 143° and 143°

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