Answer: B. 26
Explanation:
The options are:
A. 21
B. 26
C. 9
D. 15
Let the third side of the triangle be x.
Since the two sides of a triangle measure 17 inches and 9 inches, therefore we can form a triangle inequality with the figures given. This would be:
x + 9 > 17
x > 17 - 9
x > 8
Also,
x < 9 + 17
x < 26
Therefore, 8 < x < 26
Therefore, the answer is 26.