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三角形的內角和+內心與外心

Author:陳煚昇

New Resources

  • 兩組對邊相等和有直角的四邊形
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  • 【案例】圆柱体内放置一个大球六个小球

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Discover Topics

  • Algebra
  • Square
  • Parametric Curves
  • Continuity
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