Answer:
40 meters long
Step-by-step 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 :)
