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Danny Ellison
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dellison
New Resources
Monkey saddle
Street Map Construction
Random Places
arctan and arctan2 functions
Eight surface
Discover Resources
Lens Refraction and Sperical Aberration just a test
cyloid1
Perps of a triangle
Transform the Triangle
Hexagons animation
Discover Topics
Tree Diagrams
Piecewise Functions
Orthocenter
Upper and Lower Sum or Riemann Sum
Step Functions