Maths Dictionary · JSS 1
Perimeter
Simple meaning
The total distance all the way round the outside of a shape.
Example
A 5 m by 3 m rectangle has perimeter 5 + 3 + 5 + 3 = 16 m.
See it
From the Perimeter of Plane Shapes lesson. Try moving things around.
P = 2 × (5 + 3) = 16 cm
Walk round the edge: 16 one-centimetre steps. (Area would be 15 cm².) Drag the blue corner.
Length5 cm
Height3 cm