SOL009 · 3D solids & mensuration · Classes 7–10
Triangular prism
A triangular prism has two equal triangular ends joined by three rectangles. Its volume is the area of the triangle times the length.
½bh × LTriangular prism
📐 Formula
V = ½ × b × h × L
✏️ Worked example
Triangle base 4, height 3 (area 6), length 6: V = 36.
🌍 Where it is used
Tent shapes, roof sections, chocolate bars, glass prisms.
❓ Quick check
How many faces does a triangular prism have?
🏋️ Practice
EasyTriangle area 10, length 7. Volume?
Answer: 70
MediumEdges of a triangular prism?
Answer: 9
ChallengeA tent: triangle base 3 m, height 2 m, length 4 m. Volume?
Answer: 12 m³