Find the perimeter of a rectangle whose length is 28cm and diagonal is 35cm. What will be the correct answer
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Answer:
half of rectangle is triangle
length = 28 cm
breadth = ?
diagonal(hypotenuse of triangle) = 35cm
to find breadth use Pythagoras theoram
(28)^2 + (x) ^2 = (35)^2
784 + x^2 = 1225
x^2 = 441
x = 21
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