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直线与圆相切
Author:
蔡永志
直线与圆相切
GeoGebra
New Resources
找出對稱軸
判斷球體
拼砌四邊形
三位數除以一位數（二）
四邊形的特性
Discover Resources
國中數學
證平行四邊形 (對邊相等)
滚动的三角形
柯西不等式 (4)
Locus (Two points 1)
Discover Topics
Power Functions
Perimeter
Differential Equation
Ellipse
Subtraction