Question

Find the perimeter of a rectangle whose length is 28cm and diagonal is 35cm. What will be the correct answer

Answer 1

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