A triangle has sides 6, 11, and x. which of the following could be the perimeter of the triangle?

a) 17

b) 18

c) 22

d) 30

e) 34

In the triangle sum of two sides should be more than third side.

6+11=17

3d side is less than 17.

3d side should be more than difference of 2 other sides.

11-6=5

3d side should be more than 5.

Perimeter should be more than (11+6+5=22), but less than (11+6+17=34).

22 < Perimeter < 34

We have only one answer

22<30< 34

Answer: D. 30.