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High School Geometry
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Demonstrations 61  80 of 309
Dissecting a Pyramid into Four Equal Pieces
How Far Can One See from a Height?
Monte Carlo Estimate for Pi
Pythagorean Theorem
Regular Polygon Maker
How Many Rectangles Are There?
Euclid, Book 3, Proposition 22
Difference Formula for Cosine
Angle Bisectors of Two Intersecting Lines
Eratosthenes's Measure of the Earth's Circumference
The Area between Two Circles
Are the Lines Parallel?
The Sum of the Interior Angles of a Triangle Equals 180 Degrees by Paper Folding
Folding an Equilateral Triangle in a Square
Enumerating Pythagorean Triangles
Crisscrossing a Polygon
Problems on Circles VII: Circles of a Given Size Tangent to Other Two
Cartesian Coordinates Exercise
Approximating Pi with Inscribed NonRegular Polygons
The Eutrigon Theorem
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