What is perimeter?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

The of the of any is called its . Hence, 'the ' of a shape is called its . The unit of is the unit of itself. The units of may be expressed in terms of , millimetre, , kilometre, , feet, etc.,
The word is derived from the words '' and '', where 'peri' means '' and 'metron' means ''.