# Find perimeter by counting unit squares

CCSS Math: 3.MD.D.8

Practice finding perimeter by counting unit squares. We will start with rectangles and then try some irregular shapes.

If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains ***.kastatic.org** and ***.kasandbox.org** are unblocked.

Main content
# Find perimeter by counting unit squares

## Rectangles

## Irregular shapes

CCSS Math: 3.MD.D.8

Practice finding perimeter by counting unit squares. We will start with rectangles and then try some irregular shapes.