The diagonal of the rectangle is 13 cm, and one of the sides is 5 cm. Find the perimeter of the rectangle?

From the school curriculum in geometry, we know that the diagonal of a rectangle will be the hypotenuse in a triangle, where the legs are the sides.

Let us determine through what number of centimeters the length of the second side will be expressed, when from the condition of the task we know that with a diagonal of thirteen centimeters, the length of the first side is five centimeters:

√ (13 ^ 2 – 5 ^ 2) = √ (169 – 25) = √144 = 12.

Let’s determine what the perimeter of our figure will be:

(12 + 5) * 2 = 34.

Answer: 34 centimeters.