One side of the triangle is 15 cm long, the second is 1.2 times longer than the first, and the third
| April 30, 2021 | education
One side of the triangle is 15 cm long, the second is 1.2 times longer than the first, and the third is 80% of the first side. Calculate the perimeter of the triangle.
1. To answer the question of the problem, you need to know the lengths of all sides of the triangle. Since the condition says that the second side is 1.2 times longer than the first, we find the length of the second side:
1.2 * 15 = 15 + 3 = 18 cm.
2. Since it is known that the third side is 80% of the first, we find its length:
15 * 0.8 = 12 cm.
3. Knowing the lengths of all sides, we find the perimeter of the triangle:
12 + 18 + 15 = 30 + 15 = 45 cm.
Answer: 45 cm.
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