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教学素材：抛物线与象限半区分界线
Author:
清风拂琴，陌上花开
GeoGebra
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活动三：应用性质
常见四边形是否是双心四边形
盈利與虧蝕
三角函数 的副本
百分數及其應用
Discover Resources
Relations Among Trigonometric Ratios 三角比的關係
畫圓
JavaScript to Create Slider
線性變換矩陣（二階）的副本
活工(一)Q3
Discover Topics
Sequences and Series
Linear Equations
Sine
Pythagoras or Pythagorean Theorem
Dilation