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centroidjjohnson
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jtjohnson
New Resources
Ellipse as Envelope - Correspondence Method
Introduction
Cross Product in 2D and 3D
Slope of a Straight Line: Run and Rise
"Compressed" Astroid as Envelope
Discover Resources
CICLOIDE
Estimating Angles Game (Student Version)
Tessellation Project Ericka
Parallelogram Properties
จุดกึ่งกลาง 23
Discover Topics
Indefinite Integral
Pythagoras or Pythagorean Theorem
Sequences and Series
Addition
Equations