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根據百分率找數量（二）: 例1
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
New Resources
sanjiaohanshu
第八周作业
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
小数 的副本
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三角形重心(相關說明)
P2 math
angle at the same segment
面鏡的反射
橢圓3--平行四邊形法
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Rotation
Kite
Upper and Lower Sum or Riemann Sum
Numbers