- #71
phya
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Mentallic said:The point is, using the term "parallel curve" creates an ambiguity as I've already shown, unless it's specifically defined to be one or the other - which it isn't.
What is wrong with sticking to the term "concentric circles" anyway? I could just as easily argue that parallel lines are also concentric lines. It's just silly.
The concentric circle is only an example, this is only to explain the curve the parallel phenomenon. Certainly, curve parallel is not the limitation in the concentric circle. For example, the parabola may also have the parallel line. The curve parallel is the curve to the curve distance constant invariable. This is the curve parallel essence. Certainly is also the surface parallel essence. This is an axiom.