The SSS (Side-Side-Side) Theorem is a helpful way to show that two triangles are the same size and shape. Here’s how to use it:

1. Find the Triangles: First, look for the two triangles that you want to compare.

2. Measure the Sides: Check if all three sides of one triangle are the same as the sides of the other triangle. For example:

   • Triangle A: $AB = 5$, $AC = 7$, $BC = 10$
   • Triangle B: $XY = 5$, $XZ = 7$, $YZ = 10$

3. Decide if They’re Congruent: If $AB = XY$, $AC = XZ$, and $BC = YZ$, then by the SSS Theorem, Triangle A is congruent to Triangle B, which we write as $\triangle A \cong \triangle B$.

This theorem is great because all you need to do is look at the lengths of the sides!