SOL001 · 3D solids & mensuration · Classes 5–12
Cube
Six equal square faces, 12 equal edges, 8 vertices.
Cube📐 Formula
Volume = a³; Surface area = 6a²; Space diagonal = a√3
✏️ Worked example
a = 4: V = 64; SA = 96; diagonal ≈ 6.93.
🌍 Where it is used
Dice, ice cubes and storage boxes.
❓ Quick check
Surface area of a cube with edge 3: