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根據百分率找數量（一）: 例3
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
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畫出對稱圖形
兩位數除以一位數（二）
四邊形的特性
判斷球體
算柱 (兩位數)
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Sum of Exterior Angles of Polygons 多邊形外角和
N邊形滾動
點與直線距離、直線與直線距離
平移指令
Angle in alt.segment
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LCM and GCD
Triangles
Limits
Isosceles Triangles
Perimeter