Here's the GRE problem:
The length of one side of a triangle is 12. The length of another side is 18. Which of the following could be the perimeter of the triangle?
[ ] 30 [ ] 36 [X] 44 [X] 48 [ ] 60
Why are C and D correct? I'm reading that for
the perimeter of a triangle, the length of the 3rd side must be between the positive difference and the sum of the other two sides. I'm lost as to what that means? Can someone help? Thanks.