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海市蜃樓現象
Author:
Jia-ming Shiu
拉動三條折射率 可得到光的路徑
GeoGebra
New Resources
四邊形的特性
第八周作业
判斷球體
兩位數除以一位數（一）
算柱 (兩位數)
Discover Resources
以電子學習照顧數學科學習差異
證平行四邊形 (對角相等)
Parallel lines (angle of inclination and slope) v2
試作
弧長與圓周角成比例
Discover Topics
Histogram
Surface
Addition
Multiplication
Ellipse