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優良作品4
Author:
Ching-Hui Chou
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數加法
判斷球體
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
Discover Resources
專題
三角形的外心軌跡
Copy of 劉徽的「割圓術」
Slope(斜率公式)
等差数列、等比数列
Discover Topics
Fractions
Planes
Trigonometric Functions
Mathematics
Calculus