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congruent (SSA,RHS)
Author:
Ricky Chan
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
四邉形 (四年級) 教師版
算柱 (兩位數)
Discover Resources
Locus of a vertex of equilateral triangle
圆心角和圆周角
七巧板
畫圓
椭圆的两条垂直切线的交点轨迹 蒙日圆
Discover Topics
Interest Calculation
Geometric Transformations
Cylinder
Definite Integral
Conditional Probability