Maths Dictionary · JSS 3
Surface area
Simple meaning
The total area of all the faces of a solid shape.
Example
A cube of side 2 cm has surface area 6 × 4 = 24 cm2.
See it
From the Surface Area lesson. Try moving things around.
SA = 2(5×4 + 5×2 + 4×2) = 2(20 + 10 + 8) = 76 cm²
Three pairs of matching rectangles. (Volume: 40 cm³.)
Length5
Width4
Height2