Question

A triangular courtyard has a perimeter of 120 meters. The lengths of two sides are 30 meters and 50 meters. How long is the third side?

Answer 1

40 meters long

Explanation:

Okie dokie, so because we already have 2 of the three sides, and we know the total perimeter, we just have to subtract the 2 known sides from the perimeter to find the missing side.

The equation should look like this:

120 = 30 + 50 + s

First we need to combine the like terms:

120 = 80 + s

Now, in order to ind the missing side, we need to subtract 80 from both sides:

S = 40

So the missing side is 40 meter long.

Hope this helps :)