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上色練習
Author:
一路梁
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
柱體建築師
球体的体积推导（优化版）
異分母分數減法
Discover Resources
九點圓 (9-Point Circle)
構造切線 / construct the tangent line
MathMedia150206
圓與切線
製作四個不同的梯形
Discover Topics
Natural Numbers
Matrices
Area
Line Segment
Statistical Characteristics