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時鐘（教師用）
Author:
Mr Tsang
可顯示或隱藏分針，讓學生觀察時針的運動。
GeoGebra
New Resources
Prism Drawn in 1-Point Perspective
Reflection = 180° Rotation about a Line
Shells
Untitled
רישום חופשי
Discover Resources
ggbchat #4 July 16 2014
Parent Function Transformations
Elimination
S4 Properties of Circle
Scaling Figures: Effects on Areas
Discover Topics
Histogram
Unit Circle
Trigonometric Functions
Congruence
Linear Regression