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congruent (SA)
Author:
Ricky Chan
GeoGebra
New Resources
兩位數加法
判斷球體
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
四邊形的特性
Discover Resources
畢氏定理動態證明(劉徽)
多項式函數
circuit
Exterior Angle Cyclic Quadrilateral
Orthocentre
Discover Topics
Parallelogram
Derivative
Right Triangles
Vectors
Integral Calculus