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平行四辺形の対角線上の面積.ggb
Author:
T.Fujimaki
GeoGebra
New Resources
sine-wave
standingwave-reflection
カージオイド
小テスト
正１７角形 作図 regular 17-gon
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点の存在範囲（3Dボタン式-残像）
アポロニウス円錐曲線論２
中点多角形
Snapping
about canvas
Discover Topics
Tangent Function
Step Functions
Congruence
Quadratic Equations
Parallelogram