Math glossary
Perimeter
The distance all the way around the outside of a shape.
Add up the lengths of all the sides. Perimeter is measured in units of length, such as centimetres or inches.
Example: A rectangle 5 cm long and 3 cm wide has a perimeter of 5 + 3 + 5 + 3 = 16 cm.
Lessons, worksheets, practice and tools on this: Measurement.