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trigo ratios np2c
Author:
np2cmath
GeoGebra
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兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
異分母分數減法
【案例】2018年全国1卷理科12题
【案例】圆柱体内放置一个大球六个小球
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平行四邊形之變奏I
Compare areas by cutting shapes Q1
拋物線6-包絡線法
第一个绘本
全等三角形
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Cone
Line Segment
Triangles
Expected Value
Calculus