Surface Area
Surface area is the total wrapping paper needed to cover a shape.
Recap areaSurface area of 3D shapesNetsProblem solving
📖 Learn
Nets
Unfold a 3D shape flat — that's its net.
Cuboid
6 faces in 3 matching pairs: 2(lw + lh + wh).
Cube
6 identical squares: 6 × side².
Worked example
Cube with side 3 cm
- 1One face: 3 × 3 = 9
- 26 faces
- 36 × 9 = 54 cm² ✅
⭐ Practise
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