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與三個半圓相切之圓家封閉面積
Author:
張道民
GeoGebra
New Resources
異分母分數減法
兩組對邊相等和有直角的四邊形
畫出對稱圖形
兩位數除以一位數（一）
判斷球體
Discover Resources
橢圓
三角形與邊上一點求正三角形
平行四邊形中點連線及分角線交點連線形狀
空間向量座標
Copy of mearm機械手臂模擬
Discover Topics
Rotation
Probability
Rectangle
Solids or 3D Shapes
Algebra