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Postulate 9
Author:
Jason Wofsey
If two planes intersect, then their intersection is a line.
GeoGebra
New Resources
Rotating Points (Optical Illusion)
Linear Cross Section Exercise
Ellipse, Hyperbola and Circle as Envelopes
Piano. Keyboard.
Construct a Square
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Cubic Functions
Math 142-Transformations of Cosecant
Algebra and GEO + data in spreadsheet
Newton’s theorem
Notes p.7 Example 5
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Similarity Transformation or Similarity
Reflection
Real Numbers
Constructions
Derivative