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特課ggb第一堂課hw1
Author:
吳林建宏
GeoGebra
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兩組對邊相等和有直角的四邊形
sanjiaohanshu
四邊形的特性
直角坐標平面上的旋轉變換
三位數除以一位數（一）
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三菱鏡分光 紅光與藍光的角度關係
九點圓
Geometry: Angles Sum of Triangle (幾何：三角形內角和)
test
P.8.20
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Means
Geometric Distribution
Orthocenter
Upper and Lower Sum or Riemann Sum
Trapezoid