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四邊形內部反射_長寬角度可調整
Forfatter
boooooooyu
GeoGebra
Nye Materialer
異分母分數減法
兩位數除以一位數（一）
拼砌四邊形
找出對稱軸
四邊形的特性
Opdag Ressourcer
三角形重心(相關說明)
畫蛇添福
兩圓的公切線
量角器2
tttttrr
Udforsk emner
Plane figurer eller former
Statistiske karakteristika
Vectorer 2D (Todimensionel)
Spejling
Normalfordeling