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圓例4
Author:
陳柄何
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數除以一位數（二）
異分母分數減法
柱體建築師
兩組對邊相等和有直角的四邊形
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tessellation design
中空柱體
反射(鉛垂線、水平線及斜線) Reflection (vertical line, horizontal line and line)
淘宝网
切線 (The Tangent Line)
Discover Topics
Equilateral Triangles
Equations
Isosceles Triangles
Vectors 3D (Three-Dimensional)
Exponential Functions