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GeoGebra CAS Calculator for Classes
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代国兴
GeoGebra
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平行線的判定
比較五件物件的重量
活动三：应用性质
异形操场
第八周作业1
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圓&五邊形
盾牌(小動畫)
堆朵
四邊形內部反射_長寬角度可調整
金惠吉：光的反射与折射
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Algebra
Curve Sketching
Geometry
Cosine
Trigonometry