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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
Circle Passing Through 3 Points
Reflection = 180° Rotation about a Line
Exploring GeoGebra for the First Time
z`]]
Volume by Disk/Washer around y
Discover Resources
Jordyn Mims
Imaginary Numbers
LU1.7 Q11
day 98 warm up
Discover Topics
Kite
Set Theory
Secant Line or Secant
Congruence
Arithmetic Mean