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MathXplosion
A Magic Curve Ball
Eric lays it on the line with this mathemagical illusion that makes a straight line look like a curved line. It's not magic... it's math! The Educational Gist: This episode is about geometrical "line design." Line designs are created by connecting points on lines or curves with straight line segments. When carried out on cardboard with sewing needle and thread, the process is referred to as Curve Stitching or String Art.