Arc -- from Wolfram MathWorld

There are a number of meanings for the word "arc" in mathematics. In general, an arc is any smooth curve joining two points. The length of an arc is known as its arc length. In a graph, a graph arc is an ordered pair of adjacent vertices. In particular, an arc is any portion (other than the entire curve) of the circumference of a circle. An arc corresponding to the central angle ∠AOC is denoted arcAC. Similarly, the size of the central angle subtended by this arc (i.e., the

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Squircle -- from Wolfram MathWorld Plane geometry, Differential equations, Circle geometry

Great circle - Wikipedia

PMS Lissajous Curve - analytical diagram - Algebra Applied Mathematics Calculus and Analysis - Studocu

Mid-Arc Triangle -- from Wolfram MathWorld

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A Wolfram Language Approach to Real Numerical Algebraic Plane Curves « The Mathematica Journal

Arc -- from Wolfram MathWorld

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Visions in Math Imagining the abstract