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Introduce tangent ratio
Author:
VCChung
GeoGebra
New Resources
錐體建築師
拼砌四邊形
三位數除以一位數（二）
兩位數除以一位數（一）
三位數除以一位數（一）
Discover Resources
方根化簡
角平分線性質
外接圓的心
同心六邊形
除法Q2
Discover Topics
Solids or 3D Shapes
Secant Line or Secant
Power Functions
Ratios
Trapezoid