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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
Mondrian's Puzzle
Area of a Trapezoid
Area of a Circle Illustrated
Classifying Triangles
bewijs stelling van Pythagoras
Discover Resources
Cumulative frequency
Jessika Russ- Rotations 4
Moiré pattern
Pythagorean Theorem Demonstration
Parabola tangent
Discover Topics
Cylinder
Perimeter
Logarithm
Similarity Transformation or Similarity
Optimization Problems