The perimeter of the rectangle is 7.8cm and one of its sides is 1.3cm larger than the other. Find the sides of the triangle.

First you need to find the sum of the two sides of the rectangle.

This requires dividing the perimeter value by 2.

We get:

7.8 / 2 = 3.9 cm.

Let’s write one of the sides of the rectangle equal to x.

Since the second side is 1.3 cm longer than the first, then its length will be: x + 1.3 cm.

We get the equation for the sum of the sides.

x + x + 1.3 = 3.9.

2 * x = 3.9 – 1.3.

2 * x = 2.6.

x = 2.6 / 2 = 1.3 cm (first side).

x + 1.3 = 1.3 + 1.3 = 2.6 cm (second side).

Answer: The sides of the rectangle are 1.3 and 2.6 cm.



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