The side of the triangle is 6.3cm, 20.8cm less than the second side, and 0.9cm larger

The side of the triangle is 6.3cm, 20.8cm less than the second side, and 0.9cm larger than the third side. Find the perimeter of the triangle.

Determine the length of the second side of the triangle.

To do this, add the difference to the known length of the first side, namely 20.8 cm.

Will be:

6.3 + 20.8 = 27.1 cm.

Find the length of the third side of the figure.

To do this, subtract the difference from the length of the first side, which is 0.9 cm.

We get:

6.3 – 0.9 = 5.4 cm.

To find out the perimeter of a triangle, you need to sum the lengths of all its sides.

As a result, we get:

6.3 + 27.1 + 5.4 = 38.8 cm.

Answer: The perimeter of the triangle is 38.8 cm.