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正n邊形內角與外角
Author:
李春培
Topic:
Angles
正n邊形內角與外角
GeoGebra
New Resources
異分母分數減法
兩位數加法
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
球體建築師
Discover Resources
垂心
test for 2nd view
三角柱(可側轉、上下轉)
quiz 9.1 2(d)
同心圓
Discover Topics
Intersection
Subtraction
Parabola
Linear Programming or Linear Optimization
Functions