Finding missing sizes in shapes that look alike can be tricky.

Sometimes, students mix up which sides match up.

Here are some easy steps to follow:

1. Spot the Similar Shapes: Make sure the shapes are really similar.
2. Find the Scale Factor: This can be hard if the sizes aren’t clear.

Once you figure out the scale factor ( k ), you can find the missing lengths by using this simple formula:

$\text{Missing Length} = \text{Known Length} \times k$

This method helps make sense of things, even if it feels confusing at first.