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圓周 (圖形C)
Author:
Keith Ko
移動右圖中的紅線到左方虛線，就知道它是相等於左圖的哪條線。
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
兩位數加法
判斷球體
sanjiaohanshu
三位數除以一位數（二）
Discover Resources
speed
Rotational Symmetry - Tetrahedron
三角學
用數值滑桿控製物件顯示條件
gitfh 複合圖形-正四角柱中挖圓柱
Discover Topics
Line Segment
Constructions
Definite Integral
Multiplication
Coordinates