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反射定律 Law of Reflection
Author:
W.L. Wong, Albert
GeoGebra
New Resources
拼砌四邊形
三位數除以一位數(一)
四邉形 (四年級) 教師版
兩位數除以一位數(一)
兩組對邊相等和有直角的四邊形
Discover Resources
peacock2
Polygon Activity
異分母的分數加減
七巧板
圖形繪製---心型線
Discover Topics
Isosceles Triangles
Cuboid
Statistical Characteristics
Vectors
Constructions