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Get off the Earth Puzzle
Author:
Ben Sparks
GeoGebra
Get off the Earth
Made famous by puzzler Sam Loyd. Count the swordmen. Move the red dot to the other side. Count the sword men again. What's going on?
New Resources
Ellipse, Hyperbola and Circle as Envelopes
Isosceles Triangle: Quick Construction
Stairs (Optical Illusion)
Piano. Keyboard.
Ellipse as Envelope - Correspondence Method
Discover Resources
Square Roots
Jag Math - Circle Segments (3)
Parabola (vertical)
Defining e
Area of shapes using polynomials (basic)
Discover Topics
Arithmetic
Median Line
Mathematics
General Quadrilateral
Cuboid