# Triangle Inequality

Watch the video for examples of the Triangle Inequality Theorem.

Triangle Inequality Theorem –– Example

Next, check to see if the following measurements would form a triangle using what you learned from the video.

1) $$10, 12, 3$$

2) $$4, 4, 10$$

3) $$5, 6, 11$$

4) $$8, 9, 10$$

Note:  1 and 4 work.  Why don’t the sides with lengths in 2 and 3 work? Can you come up with a general rule?