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真方位角與羅盤方位角
Author:
W.L. Wong, Albert
GeoGebra
New Resources
Earth with coastline
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
判斷球體
美國國旗 (Claude 版)
Discover Resources
橫向橢圓
半圓五角形滑動
勒洛三角形頂點C軌跡
laptop height
剪切成正三棱柱（制作：李三军，修订：孟宝兴）
Discover Topics
Sequences and Series
Fractal Geometry
Statistical Characteristics
Straight Lines
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