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不規則圖形的周界(凹)
Author:
WYC
GeoGebra
New Resources
柱體建築師
兩位數加法
兩組對邊相等的四邊形
三位數除以一位數（二）
拼砌四邊形
Discover Resources
Area of cirle
正n邊形內接縮小正n邊形
比一比看谁小
活工(一)Q1
小正方体堆积的三视图
Discover Topics
Right Triangles
Bar Chart or Bar Graph
Trigonometric Functions
Vectors 3D (Three-Dimensional)
Triangles