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定周长的正多边形面积变化规律（含圆）
Author:
张英华
Topic:
Area
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
第八周作业
兩位數加法
兩組對邊相等和有直角的四邊形
四邊形的特性
Discover Resources
均分除法（分數÷整數）
Simultaneous Linear Equations 聯立二元一次方程
Cactest
探究判定全等三角形的条件（SAS）！
Kumamon
Discover Topics
Exponent
Isosceles Triangles
Fractal Geometry
Logarithmic Functions
Hypothesis Testing