Name ________________________________________ Date _____________
Practice — Triangle Inequality Theorem
Triangle Inequality Theorem
The sum of the lengths of any two sides of a triangle is ________________ than the
length of the third side.
Can these numbers be the length of the sides of a triangle? Show math to prove your
answer, using the Triangle Inequality Theorem. Then circle YES or NO.
1. 8, 9, 10 2. 1,1, 2 3. 6, 9, 8
YES NO YES NO YES NO
4. 3, 4, 9 5. 12, 4, 17 6. 8, 7, 2
YES NO YES NO YES NO
7. 14, 3, 9 8. 12, 18, 2 9. 3, 2, 1
YES NO YES NO YES NO
