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Answer 1

Answer:

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Answer 2

Answer:

If you have further doubts that why don't I have calculated the value of <B and <D but I have calculated the values of <A and <C then since the adjacent angles of a parallelogram are supplementary then you can put the values of <A and <C as 90° then you would get <B and <D as 90°.Since all the angles are 90° and the opposite sides are equal then you can conclude that ABCD is a rectangle.