Question

width of a rectangle is 5cm and it's diagonal is 13cm . Find its perimeter.

Answer 1

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.

Answer 2

*Answer*

34cm

*step by step explanation*

As we know that all angles of a rectangle are 90° that means it forms right angle triangle.

${l}^{2} + {5}^{2} \: \: \: \: \: {13}^{2}$

${l }^{2} \: \: \: \: \: 169 - 25$

${l}^{2} \: \: \: \: \: \: 144$

$l \: \: \: \: \: \: 12$

$2(l + b)$

$2(5 + 12)$

$2(17)$

$34cm$

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