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11-18的加減組合
Author:
Yin Kelvin Wong
GeoGebra
New Resources
兩位數加法
四邉形 (四年級) 教師版
異分母分數減法
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
Discover Resources
電子幾何條
How to draw a hexagon with ruler and compasses?
拋物線5--包絡線法
卫星轨道模拟模块
两角和的正切公式几何证明
Discover Topics
Expected Value
Orthocenter
Exponent
Tangent Function
Scalene Triangles