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animation for kastin
Author:
yoyowinwin_1
This is Wayne , from
bbs.emath.ac.cn
GeoGebra
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畫出對稱圖形
拼砌四邊形
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
判斷球體
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底數大於1，指對數函數交點情形。
Quiz on Addition and Subtraction of Directed Numbers (2) 有向數加減測驗(2)
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
圓面積示範
P.5 面積問題02
Discover Topics
General Quadrilateral
Hyperbola
Tree Diagrams
Ratios
Trapezoid