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生活中的平面圖形問題1
Author:
連琨銘
GeoGebra
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四邉形 (四年級) 教師版
sanjiaohanshu
兩組對邊相等和有直角的四邊形
拼砌四邊形
判斷球體
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三角形外角和為360度
幸運輪
量角器
橢圓1--同心圓法
wiki
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Diagrams
Trigonometric Functions
Angles
Planes
Fractions