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7.1.2 平面直角坐標系
Author:
Loi Teng Chong
GeoGebra
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圓的基本性質
盈利與虧蝕
撒针估算面积实验
比較五件物件的重量
平行線的判定
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Sectors 扇形
什麼是除法?
四邊形內部反射_長寬角度可調整
Rotational and reflectional symmetry of a regular polygon
正切线生成函数图像
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Volume
Line Segment
Pythagoras or Pythagorean Theorem
Cuboid
Coordinates