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Apollonio Disk
Author:
John Golden
Saw this op art design from Marina Apollonio and was thinking about how to make it. Then I liberated the point that sets the centers of the circles and found some fun designs.
GeoGebra
New Resources
Odd or Even
Slope of a Straight Line: Run and Rise
Piano. Keyboard.
Stairs (Optical Illusion)
Linear Cross Section Exercise
Discover Resources
Basic Clockface
reverse process of cosine
Constructing 3/5 on the number line (animation)
angel task 1
converting between cm and m
Discover Topics
Upper and Lower Sum or Riemann Sum
Square
Similar Triangles
Trapezoid
Parabola