About the triangular prism calculator
A triangular prism is a triangle extruded along a length l, as in tents and roof sections. Enter the three sides of the triangular end and the length; the end area comes from Heron’s formula, and the volume is that area times the length.
Formulas
| Volume | V = B·l |
| Base area (Heron) | B = ¼√((a+b+c)(−a+b+c)(a−b+c)(a+b−c)) |
| Lateral area | L = (a + b + c)·l |
| Total surface | S = L + 2B |
Frequently asked questions
What is the volume of a triangular prism?
V = (area of the triangular end) × length. For a right-triangle end with legs 3 and 4 and length 8, V = 6 × 8 = 48.