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活动三：应用性质
Author:
孟宝兴
GeoGebra
New Resources
找出對稱軸
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
兩位數加法
Discover Resources
waaachen
Task 2 Equilateral Triangle
Quiz on Solving Right Triangles (Finding Side Lengths) 解直角三角形：測驗1（求邊長）
正弦定理的验证
畢氏定理
Discover Topics
Geometric Distribution
Quadrilaterals
Distributions
Trigonometric Functions
Rational Numbers