ABCD is a parallelogram in which angle A =(4x-15)° and an angle B =(5x-3)° . find the measure of all angles of the parallelogram.
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we know that a°=1
so angleA and angleB values are same it is equal to 1
in a parallelogram adjacent angles sum should be 180
but angleA and B sum is not 180°
so ABCD is not a parallelogram
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