Question

perimeter of a rectangle 42cm. If its length is 13cm. Find it's breadth​

Answer 1

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Answer 2

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GIVEN :

Perimeter of the rectangle = 42 cm

Length of the rectangle = 13 cm

Breadth : ?

To find : The breadth of the rectangle.



Let the breadth be 'x'

Now,

Perimeter of a rectangle = 2(l + b)

=> 42 = 2(13 + x)

=> 21 = 13 + x

=> x = 21 - 13

=> x = 8

So, the breadth of the rectangle is 8 cm.



$\boxed{ \bf{extra \: information \: about \: rectangle}}$

=> Area = length × breadth

=> Perimeter = 2(length + breadth)

=> A rectangle has equal diagonals

=> Opposite sides of a rectangle are equal and parallel

=> All the interior angles are of 90°

=> Sum of all the interior angles = 360°