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Plane Geometry
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Demonstrations 121  140 of 1019
Tangents to a Rotating Ellipse
Multisecting an Angle Using Archimedes's Spiral
Equality of a Segment and an Arc in Archimedes's Spiral
Tangent to a Cycloid
Mechanism for Constructing Regular Polygons
Primitive Pythagorean Triples on a Curvilinear Grid Defined by Euclid's Formula
Trisecting an Angle Using a Conchoid
Rotation about a Point in the Plane
Matrix Transformations: "F"
Circumscribing Polygons
Archimedes' Approximation of Pi
Angle and Length Measurement of a Polygon
Circles of Apollonius
NinePoint Circle
Geometric Elements of a Circle
Focus and Directrix in a Quadratic Bézier Curve
Rational Cubic Bézier Curves
Exterior Tangents to Three Circles
Diocles's Solution of the Delian Problem
Clairaut's Angle Trisection
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