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內公切線段長求法
Author:
謝易達
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
第八周作业
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
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內切圓滾動
線之極點定理 / pole of a line theorem
平行線 (同位角 - 位置)
立面化設計
質數
Discover Topics
Step Functions
Intersection
Arithmetic Operations
Distributions
Indefinite Integral