The length of one side of the triangle is 81.5 cm, the length of the second is 7.2 cm longer than the first

univerkov | January 12, 2021 | education

The length of one side of the triangle is 81.5 cm, the length of the second is 7.2 cm longer than the first, and the length of the third is 14.3 cm longer than the second. Find the perimmeter of the triangle.

1) Let’s find out how long the second side of the triangle is, if we know that its first side is 7.2 cm shorter and its length is 81.5 cm.
81.5 + 7.2 = 88.7 cm.
2) Determine the length of the third side of the triangle if it is known that the second side is shorter by 14.3 cm, and we found out its length and it was 88.7 cm.
88.7 + 14.3 = 103 cm.
3) Find the perimeter of a given triangle if we have found all its sides.
81.5 + 88.7 + 103 = 273.2 cm.
Answer: the perimeter of this triangle was 273.2 cm.

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