1. Triangle Inequality Theorem
Yellow: 2 inches
Purple: 4 inches
Pink: 5 inches
Blue: 7 inches
Green: 9 inches
Orange: 12 inches
Triangle Inequality Theorem
Side 1 (Small)
Side 2
(Medium)
Side 3
(Large)
Triangle
Yes/No
Small + Medium
Does Theorem Work? 2 4 5 7 9 12

2. Triangle Inequality Theorem
Easy version: The smallest two sides of a triangle have a sum larger than the largest side.
Algebra: a + b > c Numbers: 2+4 > 5
The entire theorem: The sum of any two sides of a triangle is larger than the third side.
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3. Triangle Inequality Theorem
Side 1 (Small)
Side 2
(Medium)
Side 3
(Large)
Triangle
Yes/No
Small + Medium
Does Theorem Work?