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聯動鐘面（教師版）
Author:
Mr Tsang
請轉動分針上的小點，以移動分鐘。
GeoGebra
New Resources
Folding door
How to Draw a Cube in 2D
bewijs stelling van Pythagoras
Line Through Two Points and Slope
Two Triangle Theorem
Discover Resources
Theorem of three perpendiculars - Lesson
The Parabola
angle bisector
Circumcenter
Discover Topics
Multiplication
Ratios
Subtraction
Sequences and Series
Rhombus