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Introduce Tangent Ratio
Author:
VCChung
GeoGebra
New Resources
兩組對邊相等的四邊形
四邊形的特性
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
【案例】2013年安徽高考15题
Discover Resources
三角函數圖解
vector addition and subtraction
兩點距離
Triangles with the same height
數學傳播39卷4期, 平面幾何公式思考
Discover Topics
Rhombus
Differential Calculus
Logarithm
Continuity
Inequalities