Question

Find the perimeter of a rectangle whose length is 12cm and
diagonal is 13cm​

Answer 1

Answer:

First find the breadth

Use Pythagoras theorem

AB is the breadth ( h)

AB square = 13 square -12 square

169cm square- 144 square

AB=√25

AB=5cm

Breadth=5cm

Perimeter of rectangle = 2×(l+b)

=2×17 cm

=34cm

Answer 2

Given,

The rectangle length l = 12cm

The rectangle's diagonal d = 13cm

To Find,

The perimeter of the rectangle.

Solution,

Given that,

Length of the rectangle l = 12cm

Diagonal of the rectangle d = 13cm

We need to find the perimeter.

By using the Pythagoras equation,

d² = l²+w²

13² = 12²+w²

w² = 13² - 12²

w²=169-144

w²=25

w=5

Therefore, the perimeter of the rectangle

P = 2(l+w)

P= 2(12+5)

p=2×17

P = 34cm

The perimeter of the rectangle whose length of 12cm and diagonal of 13cm is 34cm.