Question

The perimeter of a triangular pool is 36 yards. The lengths of two sides are 10 yards and 15 yards. How long is the third side?

Answer 1

11 yards

Explanation:

15+10+x=36

25+x=36

36-25=x

x=11

Answer 2

11 yards

Explanation:

Well, if we already know 2 of the sides, we just have to subtract the 2 sides from the total perimeter:

36 = 10 + 15 + s

Now you combine the like terms:

36 = 25 + s

Now you have to subtract 25 from each side:

S = 11

Hope this helps :)