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直角三角形の三角比
Author:
Tatsuki Fujimoto
,
+x sir
GeoGebra
New Resources
判斷球體
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
畫出對稱圖形
找出對稱軸
Discover Resources
初中八年级奥数：面积与面积法
淮阴2015-28
兩橢圓交集
正二十面體內接黃金矩形
多邊形的切割與拼砌的副本
Discover Topics
Intersection
Distributions
Orthocenter
Rectangle
Linear Regression