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三角形內角和為180度
Author:
范欣茹
GeoGebra
New Resources
兩位數除以一位數（一）
球體建築師
拼砌四邊形
判斷球體
兩組對邊相等和有直角的四邊形
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橢圓軌跡
量筒
no10
y=a(x-h)²+k的副本
錐體建築師
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Area
Numbers
Quadrilaterals
Statistics
Rhombus