单词 | normal |
释义 | NormalAt right angles to, going directly away from. For a curve imagine a line just touching and matching the slope there (called a "tangent") and draw a line at right angles to it. Example: a circle's diameter is always normal to its circumference Likewise for a curved surface imagine a plane sitting on the surface, and draw a Normal to that plane. See: Tangent (line) |
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