Question

Suppose a triangle has two sides that measure 7 inches and 11 inches. Which of the following could be the length of the third side? Select all that apply.
A.4 inches

B. 7 inches

C. 13.5 inches

D. 18 inches

E. 20 inches

Answer 1

1.B,D
2.C
3.C
4.B
5.D
6.A
7.A
8.C

Answer 2

The rules for the side lengths of a triangle are 
A+B > C 
B + C > A 
A+ C > B 
so 
7= A 
11 = B 
11 + 7 = 18 
So 4 inches and 13.5 inches work