# Area & perimeter of rectangles word problems

Find the missing side length of a rectangle when given its perimeter or area. Compare perimeters and areas of rectangles.

If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

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

Main content
# Area & perimeter of rectangles word problems

### Problem

Find the missing side length of a rectangle when given its perimeter or area. Compare perimeters and areas of rectangles.