📐 三棱柱Triangular Prism Calculator

使用说明与常见问题How-to & FAQ

「三棱柱」是什么？What is the Triangular Prism Calculator tool?

V = 底面积 * 长；底为三角形 (½ab sin C 或 ½bh)。本地处理。可设置「底边」、「底高」、「棱柱长」。V = base area * length; triangular base ½bh. Processed locally. Settings: Base, Base height, Length.

如何使用「三棱柱」？How do I use the Triangular Prism Calculator tool?

在「三棱柱」中，填写「底边」、「底高」、「棱柱长」等参数，结果会随输入实时计算并显示在下方。In the Triangular Prism Calculator: Fill in "Base", "Base height", "Length"; results are recalculated instantly as you type.

斜棱柱也适用吗？Does it work for an oblique prism?

本页按直棱柱计算：体积 = 三角形底面积（½ × 底 × 高）× 长度。斜棱柱的体积公式相同，但长度要用两个底面之间的垂直距离，而不是斜边长度。It assumes a right prism: volume = triangle area (½ × base × height) × length. An oblique prism has the same formula if you use the perpendicular distance between the two ends rather than the slanted edge.

能举个计算实例吗？Can you show a worked example?

例如在「三棱柱」中填 底边 = 6，底高 = 4，棱柱长 = 10，结果区显示：底面积：12；体积：120For example, entering Base = 6, Base height = 4, Length = 10 in the Triangular Prism Calculator gives: Base area: 12; Volume: 120

哪些输入会被检查？Which inputs are validated?

「三棱柱」会检查这些输入——「底边」：必须填写，须大于 0且不大于 1,000,000,000；「底高」：必须填写，须大于 0且不大于 1,000,000,000；「棱柱长」：必须填写，须大于 0且不大于 1,000,000,000；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Triangular Prism Calculator checks its inputs — "Base": required, must be more than 0 and at most 1,000,000,000; "Base height": required, must be more than 0 and at most 1,000,000,000; "Length": required, must be more than 0 and at most 1,000,000,000; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.

有哪些选项可以调整？What options can I adjust?

「三棱柱」的设置：「底边」默认 6；「底高」默认 4；「棱柱长」默认 10。每次生成结果都按当前设置处理。Settings in the Triangular Prism Calculator — "Base" default 6; "Base height" default 4; "Length" default 10. The result always uses the current settings.

计算精度如何？How precise are the results?

「三棱柱」使用 JavaScript 双精度浮点数（约 15–16 位有效数字）；极大或极小的数值可能存在精度误差。The Triangular Prism Calculator uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.

「三棱柱」免费吗？需要注册吗？Is the Triangular Prism Calculator free? Do I need an account?

「三棱柱」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Triangular Prism Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.