The perimeter of the triangle is 39 cm. The length of one side is 17 cm. The other is 5 cm smaller.
| February 9, 2021 | education
The perimeter of the triangle is 39 cm. The length of one side is 17 cm. The other is 5 cm smaller. Find the length of the third side.
The perimeter is 39 cm.
Side length – 17 cm.
The length of the second side is 5 cm less.
Let’s define the third side of the triangle.
The perimeter is the sum of the lengths of all sides. First, we find the length of the second side. We write down the solution.
17 – 5 = 12 cm.
This means that the length of the second side is 12 cm. Find the length of the third side. We write down the solution.
P = a + b + c.
s = P – a – b = 39 – 17 – 12 = 10 cm.
This means that the length of the third side is 10 cm.
Answer: The length of the third side of the triangle is 10 cm.
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