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Abraham Gadalla
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Demonstrations 1  20 of 32
Area of a Quadrilateral within a Triangle
Decorating a Tree with a Ribbon
Tangent Circles to Two Parallel Lines and Passing through a Point
Ratios of the Areas of an Internal Hexagon to Its Star to the External Hexagon
Draw Your Smiley Face
Parabola as a Locus of Centers of Circles
Pascal's Barrel
Volume under a Sphere Tangent to a Cone
Designing a Logo
YMCA Logo
Percentage Errors in Approximating the Volumes of a Wine Barrel and a Goblet
Ratio of Areas in a Square
Moving a Circle in a Parabola
Pool Circles
Minimum Area between a Semicircle and a Rectangle
Ball Bearings
Ratio of the Areas of a Circular Segment and a Curvilinear Triangle
Swing the Logarithmic Curve around (1, 0)
The Area of a Square in a Square
Area between a Line and the Graph of a Function
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