The perimeter of the triangle is 62 cm, the length of one side is 18 cm, the other is 21 cm. Find the length of the third side.
| April 19, 2021 | education
1. Find the sum of the lengths of the two sides of the triangle by adding their lengths together.
18 + 21 = 39 (cm) the sum of the two sides of this triangle.
2. Find the length of the third side for this from the perimeter of the triangle, subtract the sum of the lengths of its other two sides.
62 – 39 = 23 (cm) the length of the third side of the triangle.
Answer: 23 cm.
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