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空間中兩向量夾角
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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【案例】2018年全国1卷理科12题
兩位數除以一位數(二)
找出對稱軸
画直线等分三角形的面积
兩組對邊相等的四邊形
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多邊形上的自由動點
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5,求 ad - bc 最大值?
How to draw a decagon with ruler and compasses?
二倍角的正切公式的证明
小立方体组合的三视图【输入框法】
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Mode
Ellipse
Expected Value
Geometry
Tangent Line or Tangent