**PERIMETER**

When we find the perimeter of a shape, we measure all the way outside. The word 'perimeter' comes from the greek 'peri' which means around, and 'meter' which means 'to measure'.

**AREA**

The space inside a 2D shape can be measured in cm2, m2, mm2

Calculated using formulae, or occasionally by counting squares.

AREA OF A RECTANGLE = *length x width*

AREA OF A TRIANGLE = *base x height*

* 2 (height must be perpendicular to base)*

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