Question

if
diagonal of rectangle is 13 cm and one of its side is 5 cm then
find its perimeter and area?
​

Answer 1

Answer:

as we know that all angles of a reactanges are 90°

that means it forms a right angled traingle when divided by a digonal

apply pythagoras theorem and find the length using pythagora theorem

let the length be l

(l)^2 + (5)^2 = (13)^2

l^2 = 169 - 25

l^2 = 144

l = 12

so, the length measure 12 cm.

we got the length and know the breadth so,

to find the perimeter apply the formula

2 (l +b)

2 (5 + 12)

2 (17)

34 cm.