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vector addition and subtraction
Author:
sealion1215
GeoGebra
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画直线等分三角形的面积
兩位數除以一位數（一）
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
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相似三角形例題
正n邊形的組合
TRIANGLE
五上複合圖形的面積
相似三角形的构造01.许兴华数学
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Mode
Statistical Characteristics
Triangles
Line Segment
Parametric Curves