The perimeter of the triangle is 60 cm. The length of the first side is 23 cm
| February 10, 2021 | education
The perimeter of the triangle is 60 cm. The length of the first side is 23 cm, and the length of the second is 7 cm less. Find the length of the third side.
Find the length of the second side of the triangle if it is known that it is 7 centimeters shorter than the first side.
23 – 7 = 16 centimeters.
Find the sum of the lengths of the two sides of the triangle.
16 + 23 = 39 centimeters.
Since the perimeter of a triangle, that is, the sum of the lengths of all its sides, is 60 centimeters, and the sum of the two sides is 39 centimeters, the length of the third side is:
60 – 39 = 21 centimeters.
Answer: The third side of the triangle is 21 centimeters long.
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