Question

if one angle of a parallelogram is90 degree prove that it is a rectangle​

Answer 1

Answer:

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

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

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