Question

the length of rectangle is 15cm and it's diagonal is 19cm. find it's perimeter​

Answer 1

Answer:

Hello friend your answer is 30+ 4√34 cm

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Answer 2

Answer:

The diagonal of a rectangle divides it into two congruent right triangles.

Let, in a triangle, the breadth be x.

Now,

$hypotenuse^{2} = base^{2} + height^{2}$

or, $19^{2} = 15^{2} + x^{2}$

or, $x^{2} = 19^{2} - 15^{2}$

or, $x^{2} = 361 - 225$

or, $x^{2} = 136$

or, x = 11.6 cm

Breadth of the rectangle is 11.6 cm

Perimeter = 2(length+breadth)

= 2 ( 15 + 11.6 )

= 2 x 26.6

= 53.2 cm

Perimeter of the rectangle is 53.2 cm

Hope it helps you :)