# The length of the first side of the triangle is 7cm, the second is 13cm. The perimeter of the triangle is 32cm.

August 30, 2021 | education

| **The length of the first side of the triangle is 7cm, the second is 13cm. The perimeter of the triangle is 32cm. What is the length of the third side of the triangle?**

Since the perimeter and two sides of the triangle are known, we find the third side of the triangle by subtracting the sum of the other two sides from its perimeter:

Third side length = 32 cm – (7 cm + 13 cm) = 32 cm – 20 cm = 12 cm.

Answer: The length of the third side of the triangle is 12 centimeters.

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