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Author:
Tsang Kin Fun Francis
GeoGebra
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找出對稱軸
四邊形的特性
第八周作业
兩位數除以一位數（一）
兩組對邊相等的四邊形
Discover Resources
相似三角形條件 - 三邊成比例
從長方形的「周界」找回它的「長」和「闊」
rotational symmetry_1
科赫雪花 (Koch Snowflake)
sinx & cscx
Discover Topics
Orthocenter
Polynomial Functions
Normal Distribution
Parabola
Arithmetic Mean