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保持2:3:4
Author:
hjyanghj
Topic:
Geometry
GeoGebra
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兩組對邊相等和有直角的四邊形
找出對稱軸
畫出對稱圖形
近似值：有效數字
判斷球體
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試證明：A=B+C
接听率与人工呼入量、人工呼出量之间的关系
分數
藝術之美 (1)
三角形的面積
Discover Topics
Exponential Functions
Arithmetic Operations
Function Graph
Similar Triangles
Optimization Problems