One side of the triangle is 60cm, the other side is 3 times smaller than the first, and the third side is 27cm less than the sum of the first and second sides. What is the perimeter of the triangle?
1) Let’s find out what is the length of the second side, if it is known that it is three times less than the first side of the triangle, and the first side of the triangle was 60 cm.
60/3 = 20 cm.
2) Find out what is the sum of the lengths of the first two sides, if the first side is 60 cm long, and the second 20 cm.
60 + 20 = 80 cm.
3) Find out what is the length of the third side, if it is 27 cm less than the sum of the lengths of the first two sides.
80 – 27 = 53 cm.
4) Find out the perimeter of the triangle.
80 + 53 = 133 cm.
Answer: the perimeter of the triangle was 133 cm.
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