find which of the following are true. give reason to justify your answer in each case.
(a) two obtuse angle are congruent .
(b) two rectangles having the same perimeter are congruent.
(c) two squares having the same perimeter are congruent .
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1) false - all obtuse angle are not congruent. eg- one angle is 130° and other is 140°
2) For these two rectangles to be congruent, they must have the same proportions which means that the ratio of a/b = A/B. The length of a rectangle is greater than its breadth by 3m. ... The perimeter of a rectangle is 28m and its diagonal is 10m.
3) That means that the sides of both the squares are equal and hence the squares are congruent.
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