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鐘面的時間（時和分）
Author:
Eduardo Neto
,
Anthony OR 柯志明
柯志明 香港 GeoGebra 學院
New Resources
Wag the dog- Harmonic Oscillator
Absolute Value and Distance
Pythagoras' Theorem --Area dissection 2
planet moving
Geometry of 2x2 Matrix Multiplication with Intro Questions
Discover Resources
Adv Func
parallelogram
Nature of the Roots (Example 1)
Maths B 17_10 Trails
Proof of Pythagoras' theorem (Henry Perigal)
Discover Topics
Upper and Lower Sum or Riemann Sum
Difference and Slope
Fractions
Parallelogram
Parametric Curves