Find the perimeter of a triangle with two sides 2 cm long and the third side 11 mm shorter than the sum

Find the perimeter of a triangle with two sides 2 cm long and the third side 11 mm shorter than the sum of the lengths of these sides.

First, you need to determine the sum of the lengths of the two sides of the triangle.

We sum up 2 and 2 cm.

We get:

2 + 2 = 4 cm.

We translate this value of length into millimeters.

Since 1 cm is 10 mm, we get:

4 * 10 = 40 mm.

Find the length of the third side.

To do this, subtract the difference from the sum of the two sides, namely 11 mm.

Will be:

40 – 11 = 29 mm.

From this it follows that the perimeter of the triangle will be equal to:

40 + 29 = 69 mm.

69 mm = 69/10 = 6 cm 9 mm.

Answer: The perimeter of the triangle is 6 cm 9 mm.