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Demonstrations 1  20 of 52
Draining of Two Connected Tanks
Updated this month
Seven Touching Cylinders Puzzle
Making the Three Areas Defined by Congruent Overlapping Circles Equal
Social Golfer Problem
Opposite Coefficients Method for Solving Two Equations in Two Unknowns
Solving a System of Two Linear Equations with Substitution
Lion and Man
The Lucas Ship Problem
Halving the Perimeter of a Zigzag Polygon
The Seven Bridges of Königsberg
Three Equal Segments from the Altitudes of a Triangle
Circumcircles of Two Midpoints and an Altitude
Bisecting the Area and Perimeter of a Triangle
Three Circles with Two Common Tangents
Reflections of a Line through the Orthocenter in the Sides of an Acute Triangle
Squares on a Line Segment
Implicit Function Transformations Quiz
Function Transformations Quiz
The Secretary Problem
Inconsistent Sets of Statements from Knights and Knaves
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