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三角函数线
Author:
冯伟冀
Topic:
Trigonometry
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
判斷球體
Discover Resources
VV圓
圓周 (圖形F)
new book
圓外切及內切
solid of revolution
Discover Topics
Similar Triangles
Continuity
Interest Calculation
Linear Regression
General Quadrilateral