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Introduce Tangent Ratio
Author:
VCChung
GeoGebra
New Resources
異分母分數減法
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
畫出對稱圖形
直角坐標平面上的旋轉變換
Discover Resources
tanx & cotx
圓柱截痕
比較角的大小 一
腳踏車風火輪
dingding_test
Discover Topics
Bar Chart or Bar Graph
Reflection
Power Functions
Tree Diagrams
Differential Equation