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数学1 比例式 (数学3 相似な図形)
Author:
石田優耶
GeoGebra
New Resources
小テスト
二次曲線と離心率
正１７角形 作図 regular 17-gon
円の伸開線
standingwave-reflection-free
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合同の証明
Twofold symmetry
円錐曲線と展開図（conic curves and it on the x-yplane)
正四角柱から正四角錐へ
楕円の中点の軌跡
Discover Topics
Upper and Lower Sum or Riemann Sum
Variance
Geometry
Rotation
Inequalities