Question

Find the range of possible measures for the third side of a triangle is the first two sides are 9 and 9.

answer choices:
1 < x < 18
0 < x < 17
0 < x < 18
4 < x < 15

Answer 1

In a triangle the sum of two sides is always greater than the third side.

9-9 < x < 9+9

0 < x < 18 This is the answer

Answer 2

In a triangle the sum of two sides is always greater than the third side.

9-9 < x < 9+9
0 < x < 18 ← answer