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Geometry
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Demonstrations 2221  2240 of 3146
Drilling a Hexagonal Hole
Complex Polynomials
Perpendiculars from a Point on the Line between the Endpoints of the Angle Bisectors
Concyclic Points Associated with an Angle Bisector and an Excircle
Dividing a Triangle by Lines Parallel to Two Sides
Subtriangles Formed by Concurrent Lines Parallel to the Sides of a Triangle
Reflecting a Point through the Midpoints of a Triangle's Sides
Equal Chords
The Area of the Incentral Triangle
Cycloid Curves
Areas of Parallelograms and Trapezoids
Protractor Practice
Golay Code
Balls Rolling on a Sphere
The Multiplication Parabola
Finding a Tangent Line to a Parabola
Visual Computation of an Integral
A Concurrency from Circumcircles of Subtriangles
A Concurrency from the Midpoints of Line Segments through the Circumcenter
A Concurrency from the Reflections of the Contact Points with the Excircles
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