Question

abcd is a parallelogram.if the two diagonals are equal.find the measure of angle abc

Answer 1

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As we know about Parellelogram.
So,.
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Answer is
In a parallelogram if two diagonals are equal, then the parallelogram is a rectangle.So, ABCD is a rectangle.It is known that each interior angle of a rectangle is 90 degree.Since ABC is an interior angle of rectangle ABCD, so measure of angle ABC is 90 degree.