SOL008 · 3D solids & mensuration · Classes 7–12
Prism
Two identical polygon ends joined by rectangles. Shown: a triangular prism with an equilateral base.
Prism📐 Formula
Volume = base area × length; triangular base area = (√3/4)a²
✏️ Worked example
a = 4, h = 6: base ≈ 6.93; V ≈ 41.57. Faces 5, edges 9, vertices 6.
🌍 Where it is used
Glass prisms split light; tents and Toblerone boxes.
❓ Quick check
Faces of a triangular prism: