Describe the possible lengths of the third side of the triangle given that the lengths of the other two sides are 12 feet and 18 feet.

Question

I am not sure how to figure out this problem, may someone please assist in helping me? I am very troubled by this 

Answer 1

the sum of the lengths of any two sides of a triangle is always greater than the length of the third side

T=the third side

12+18>T

12+T>18

18+T>12

the first equation says that T<30

the second equation says that T>6

putting these together...

6<T<30