The perimeter of the triangle is 28 cm. The length of the first and second sides is 9 cm
| May 7, 2021 | education
The perimeter of the triangle is 28 cm. The length of the first and second sides is 9 cm and 7 cm. Find out the length of the third side of this triangle.
The task is not difficult. From the problem statement, the perimeter of the triangle is known, and its two sides are also known. The perimeter of a triangle is equal to the sum of all three sides. First, we find out the sum of the two sides, and then we will answer the question of the problem.
1. Find out what the sum of the two sides of the triangle is equal to.
9 + 7 = 16 centimeters.
2. Find out what the third side of the triangle is.
28-16 = 12 centimeters.
Answer: The third side of the triangle is twelve centimeters.
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