To understand the Triangle Inequality Theorem, let’s think about a triangle. You can easily draw one to see how it works. Here’s a simple guide:

1. Draw Your Triangle: Make a basic triangle with three sides.

2. Label the Sides: Name the lengths of the sides. Let's call them $a$, $b$, and $c$. Each letter should be opposite its own corner.

3. Look at the Rules: Now, let's highlight some important rules:

   • The length of $a$ plus $b$ must be greater than $c$ (which we write as $a + b > c$).
   • The length of $a$ plus $c$ must be greater than $b$ (so $a + c > b$).
   • The length of $b$ plus $c$ must be greater than $a$ (which means $b + c > a$).

These rules explain that when you have a triangle, if you add the lengths of any two sides together, they will always be longer than the third side.

This is a neat way to show this important idea!