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Author:
Fabrizio N. Umberg
GeoGebra
New Resources
Angles and Intersecting Lines: Quick Investigation
Ellipse as Envelope - Correspondence Method
Limaçon / Cardioid as a Locus - A Classical Construction
Stairs (Optical Illusion)
Slope of a Straight Line: Run and Rise
Discover Resources
Multiplication of Natural Numbers
Diagonals of a Rectangle
a proof of pythagorean theorem (thanks sonom)
Riemann and Trapezoid Sums
Jeena angle star
Discover Topics
Equilateral Triangles
Subtraction
Pythagoras or Pythagorean Theorem
Differential Calculus
Derivative