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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
Converting Between Degrees and Radians
Proof of a Rhombus by Construction and Deduction
seo tool
Untitled
Learn to Prove: Kite
Discover Resources
forum3
Cofactors of a Matrix
Exponential Transformations
Translation of the sine curve
Косинусоида
Discrete Fourier Transform
Discover Topics
Triangles
Function Graph
Random Experiments
Arithmetic
Step Functions