Question

Fill in the blank with the range of possible value

Answer 1

Remember that

The Triangle Inequality Theorem states that the sum of any two sides of a triangle must be greater than the measure of the third side

so

Applying the theorem

9+11 > x

20 > x ----------> x<20

and

x+9 > 11

x> 11-9

x> 2

therefore

2 < x < 20