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พีระมิด61
Author:
suriya sarakhon
GeoGebra
New Resources
Ellipse as Envelope - Correspondence Method
Cross Product in 2D and 3D
History of Maths
Stairs (Optical Illusion)
Spinning cube - Belt Trick
Discover Resources
Quadratic curves and Equations Set 2
Trig and Complements
The Unit Circle - Trigonometric Ratios
Maximize the Area with Fixed Perimeter
Rotation of Points 點的旋轉
Discover Topics
Algebra
Correlation
Median Line
Trapezoid
Cylinder