The perimeter of the triangle is 42 cm, one and its sides are 3/7 of the perimeter and the other 5/12 of the first.

univerkov | January 3, 2021 | education

The perimeter of the triangle is 42 cm, one and its sides are 3/7 of the perimeter and the other 5/12 of the first. Find the length of the third side.

To solve the problem, you first need to determine the length of the first side.
Since it is 3/7 of the perimeter, we get:
3/7 * 42 = 18 cm.
Find the length of the second side.
To do this, multiply the first side by a part.
We get:
18 * 5/12 = 7.5 cm.
Find the length of the third side.
To do this, subtract the sum of the first and second sides from the perimeter value.
We get:
42 – (18 + 7.5) = 16.5 cm.
Answer: The length of the third side is 16.5 cm.

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