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比較角的大小2
Author:
cheukyiu813
GeoGebra
New Resources
四邊形的特性
兩位數除以一位數（一）
四邉形 (四年級) 教師版
拼砌四邊形
第八周作业
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反演 (Inversion)
思考題
幾何鋪磚
S0G4L2 到两点距离的运算值为定值1：到两点距离和
序列（圆内弦）
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General Quadrilateral
Linear Programming or Linear Optimization
Translation
Orthocenter
Scatter Plot