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任意四边形各边中点的连线必构成平行四边形.许兴华数学
Author:
许兴华数学
Topic:
General Quadrilateral
GeoGebra
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異分母分數減法
第八周作业
拼砌四邊形
算柱 (兩位數)
直角坐標平面上的旋轉變換
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向量分解
三角柱算體積
角平分線
田中太郎
正三角形繞正方形旋轉
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Multiplication
Exponential Functions
Congruence
Trapezoid
Polynomial Functions