Question

Q
The length of a rectangle is 12cm and its diagonal is 13cm find its perimeter.​

Answer 1

Step-by-step explanation:

Draw a rectangle ABCD join B to C making a diagonal of 13cm

Now apply Pythagoras Theorem in triangle BCD

BC² = CD² + BD²

13² = 12² + BD²

169= 144 + BD²

BD² = 169-144

25

BD = root of 25

5

Perimeter of rectangle = 2(l×b)

2(12×5) = 120