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circle: line from centre
Author:
Ng Ching Yi
GeoGebra
New Resources
兩組對邊相等的四邊形
判斷球體
兩位數加法
直角坐標平面上的旋轉變換
算柱 (兩位數)
Discover Resources
百分數（小學）：折扣 / 賺賠
已知正三角形內部一點到三邊距離求面積
Three-phase electric power
正四面體
DSE Circle-ACT01B Relationship between Centre and Chord
Discover Topics
Arithmetic
Trapezoid
Median Line
Reflection
Conditional Probability