Step-by-step explanation:
The sum of the lengths of any two sides of a triangle must be greater than the third side.
1. Let's list all the sets. {8, 16, 21}{12, 17, 27}{8, 23, 31}{5, 8, 11}
2. Now is...
8+16 greater than 21?
12+17 greater than 27?
8+23 greater than 31?
5+8 greater than
