'Called concave' presentation slideshows

Learning Goal: I know that telescopes make it easier to see stars and planets.

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Convex Sets & Concave Sets

p. p. R. R. 1. 2. q. q. Concave. Convex. Convex Sets & Concave Sets. A planar region R is called convex if and only if for any pair of points p, q in R , the line segment pq lies completely in R. Otherwise, it is called concave. An Example. 4. 1. 2. 3. Convex Hull.

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