The length of the first side of the triangle is 18 cm, the second is 3 times less, and the length

| September 6, 2021 | education

The length of the first side of the triangle is 18 cm, the second is 3 times less, and the length of the third side is 14 cm. find the perimeter.

1) Find the length of the second side of the triangle. The problem statement says that it is 3 times less than the first. The length of the first side of the triangle is 18 cm, which means:
18: 3 = 6 cm.
2) Find the perimeter of the triangle.
The perimeter of a geometric figure is the sum of the lengths of its sides. Let’s write a formula for the perimeter of a triangle.
The triangle has three sides. Let us denote them by the letters a, b and c. The perimeter will be denoted by the letter P. We write the formula:
P = a + b + c,
P = 18cm. + 6cm. + 14cm. = 38cm.
Answer: the perimeter of the triangle is 38 cm.



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