if one angle of a parallelogram is90 degree prove that it is a rectangle
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Consider ABCD be a parallelogram and measure of angle C is 90°. Thus, m∠A=m∠B=m∠C=m∠D=90°. Since, all the angles of the parallelogram are equal to 90, therefore ABCD is a rectangle, by the properties of rectangle
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opposite sides of parallelogram are are parallel
thus if one angle of parallelogram is 90 degree then and the remaining will be also 90
we know that a quadrilateral with opposite side parallel and angle 90 degree is a rectangle therefore if one angle of a parallelogram is 90 degree then and it is a rectangle
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