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High School Geometry
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Demonstrations 41  60 of 309
Five Circles and the Golden Ratio
Crane Model
Cogwheel Drive
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
The Statue of Regiomontanus
Folding an Equilateral Triangle in a Square
Enumerating Pythagorean Triangles
Crisscrossing a Polygon
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