Question

Find the perimeter of a rectangle whose width is 5 cm and diagonal is 13 cm. (Please show the steps and answer it really fast!!)

Answer 1

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Perimeter =2(length+width)

we calculate the length

ADC right triangle in D

AC = diagonal: 13cm

AD = width: 5cm

pythagoras to calculate DC

DC²=AC²-AD²

DC²= 13²-5²

DC=√144 = 12cm

we calculate the perimeter:

P=2(12+5)=2*17=34cm

Explanation: