Question

If a triangle courtyard has perimeter 120 meters. The length of two sides are 30 meters and 59 meters. How long is the third side

Answer 1

Given the perimeter of the triangle is

`\text{Perimeter = 120 m}`

The length of the two sides is 30 meters and 59 meters.

The perimeter of the triangle is the sum of its three sides, and they give you what the value in meters is 120 m.

Let the length of the third side be x.

`\begin{gathered} \text{Perimeter = side 1 + side 2 + side 3} \\ 120\text{ = 30 m + 59 m + x } \\ x=120-89 \\ x=31\text{ m} \end{gathered}`

Thus, the length of the third side is 31 m.