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S0G38 三角形的內心
Author:
学用数学
GeoGebra
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畫出對稱圖形
兩位數除以一位數（二）
球體建築師
兩組對邊相等和有直角的四邊形
拼砌四邊形
Discover Resources
固定三角形的條件−題6
Reflection
艾雪鑲嵌2
割圓
Sphere[O, r]
Discover Topics
Tangent Function
Solids or 3D Shapes
Algebra
Rectangle
General Quadrilateral