# The sides of a triangle are 5 cm, 3 cm and 7 cm. Find the sides of a similar triangle

September 28, 2021 | education

| **The sides of a triangle are 5 cm, 3 cm and 7 cm. Find the sides of a similar triangle, the perimeter of which is 105 cm.**

Let’s find the perimeter of this triangle as the sum of its sides.

5 + 3 + 7 = 15 cm.

Let’s find how many times the perimeter of such a triangle is greater than the perimeter given to us.

105: 15 = 7 times.

Let’s find the sides of a similar triangle.

5 * 7 = 35 cm;

3 * 7 = 21 cm;

7 * 7 = 49 cm.

Answer: the sides of such a triangle are 35 cm; 21 cm vs 49 cm.

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