One side of a triangle is 7 and the other is 5 cm. What is the third side of a triangle if its perimeter is 18 cm?
| July 10, 2021 | education
1. Perimeter is the sum of the lengths of all sides.
2. If you know the perimeter of the triangle and the values of its two sides, then you can easily calculate what the third side will be:
18 – 7 – 5 = 6 centimeters.
Answer: The third side of the triangle is 6 centimeters.
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