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內外切圓性質
Author:
連琨銘
GeoGebra
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兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
找出對稱軸
畫出對稱圖形
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梯形
cute panda
內心
平行四邊形的面積 的複本
翰林數學_1下_CH5-2_算術平均數與中位數與眾數
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Diagrams
Continuity
Circle
Cosine
Vectors 2D (Two-Dimensional)