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梯形有甚麼特性？
Author:
Anthony OR 柯志明
English version:
http://ggbtu.be/m79855
GeoGebra
New Resources
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
四邊形的特性
找出對稱軸
球體建築師
Discover Resources
龍騰4_1-1講段7
畫三角形 題2e
Statistics (M1)
李冠逸 拋物面反射
拋物線5--包絡線法
Discover Topics
Vectors 3D (Three-Dimensional)
Random Experiments
Area
Isosceles Triangles
Percentages