Compute volume by the prismoidal formula from two end areas and the mid-area.
输入两端面积 A₁、A₂、中截面 A_m 与间距 L,求体积。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Prismoidal formula | V = L × (A1 + 4Am + A2) ÷ 6 with Am the mid-section area | Simpson's 1/3 rule applied to earthworks |
| Versus average end-area | Prismoidal accounts for curvature; more accurate in transitions than end-area | Earthwork method-accuracy studies |
| Applicability | Best with smoothly varying sections; add mid-sections at abrupt changes | Computational-geometry applicability note |
| Odd-interval requirement | Simpson needs an even number of intervals; close the last with a trapezoid | Numerical integration rule |
工作与生活中的相关计算与查询。