Question

Find the perimeter of this
rectangle.​

Answer 1

Answer:

Perimeter of rectangle is 2x ( l + b )

Step-by-step explanation:

Here , l is 12 ( given )

and b is 13^2 - 12^2 = b^2 ( By Pythagoras theorem)

b is 169 - 144 = b^2

b is 25 = b^2

b is 5.

Perimeter = 2 x (12 + 5)

= 2 x 17

= 34 ( Answer )

Answer 2

Step-by-step explanation:

Given:-

A rectangle of a length 12 units and the length of the diagonal is 13 units

To find:-

Find the perimeter of the rectangle.

Solution:-

Length of the rectangle (l)=12 units

Length of the diagonal(d)=13 units

we know that

Length of the diagonal of a rectangle

=√(l²+b²). units

=>13=√(12²+b²)

=>13²=12²+b²

=>169=144+b²

=>b²=169-144

=>b²=25

=>b=√25

=>b=5 units

Breadth of the rectangle=5 units

Perimeter of the rectangle=2(l+b) units

=>P=2(12+5)

=>P=2(17)

=>P=34 units

Answer:-

Perimeter of the rectangle=34 units