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Happy and Sad Numbers
Author:
t.spillane
Topic:
Numbers
A dynamic Happy or Sad number checker
GeoGebra
Move point X around to see if the iterations converge to 1 or loop. The x and y co-ordinates together represent one number. E.g. (12,2) = 122
New Resources
Angles of Intersecting Lines
Sketching Vector Function (1)
Drunk Parabola
Math Art Construction
Toroidal Spiral
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Helix (3d Parametric, velocity, accel)
Trig Ratios in Unit Circle (small screen)
Turquía (Kayseri): Alturas.
Incenter
I. 2. Write the matrix for reflection in line OA (Class)
Discover Topics
Pie Chart or Circle Chart
Rational Numbers
Sphere
Ratios
Circumcircle or Circumscribed Circle