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Main Concept
Surface area is the total area on the outside of a 3D shape It shows how much wrapping paper covers it Measured in cm2 m2 or ft2
Example Cube
A cube has six equal sides Each side 18 x 18 = 324 cm2 Total 324 x 6 = 1944 cm2
How to Remember
Surface area means outside area Think wrapping paper Always use square units
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