Question

Find the perimeter of a rectangles whose one side is 15 cm and diagonal is 25 cm​

Answer 1

Answer:

perimeter=70cm

Step-by-step explanation

so clearly 25²=15²+x²

x²=625-225

x=20

perimeter of a triangle=2(l+b)

                                   =2(20+15)

                                 =70

hope you understand

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Answer 2

Answer:

let 15cm =a and 25cm =d.

Length of third side-

d^2= a^2 + b^2

25^2= 15^2 + b^2

625= 225 + b^2

b^2= 400

b= 20

Perimeter of rectangle -

2(15+20)

30+40

70cm

Hope it helps<3