The perimeter of a triangle is 48 cm. The length of one side is 16 cm, and the other is 18 cm.

univerkov | March 25, 2021 | education

The perimeter of a triangle is 48 cm. The length of one side is 16 cm, and the other is 18 cm. Find the length of the third side of this triangle.

1 side – 16 cm
2 side – 18 cm
3rd side -? cm
P = 48 cm

Decision:
Find the sum of the two sides, subtract it from the perimeter, since the perimeter is the sum of the lengths of all sides. And we get the length of the third side.
1) 16 + 18 = 34 (cm) – 1 and the second side together
2) 48 – 34 = 14 (cm) – third party.
Answer: 14 centimeters is the length of the third side of the triangle.

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