The Pythagorean Theorem can help you solve tricky geometry problems easily. Here’s a simple way to do it:

1. Find the right triangle: First, look for the triangle with a right angle. This is where you start.

2. Label the sides: Call the two shorter sides $a$ and $b$, and the longest side (the hypotenuse) $c$.

3. Use the theorem: Apply the formula $a^2 + b^2 = c^2$ to figure out any missing side lengths.

4. Solve it: If needed, rearrange the formula, and confidently calculate the missing length!

Once you practice it, this theorem becomes a really handy tool!