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Perpetual calendar
Author:
Jean David
GeoGebra
1) Find the principle of the calendar. 2) Explain the red month for leap years.
New Resources
Graph of y = ax² + bx + c
Graphical solution of ax² + bx + c = k
Quiz: Vertical Angles and Linear Pairs
Triangle Flexer
Toroidal Spiral
Discover Resources
Rotation - Angles
Függvények határértéke
GeoGebra Talk
Slope function.
Ruiz_Period1_Translations
Discover Topics
Similar Triangles
Sphere
Pie Chart or Circle Chart
Cube
Hyperbola