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街灯　影の長さ

Author:増永雄大

Topic:Constructions, Geometry, Straight Lines, Planes, Similar Triangles

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小テスト
円の伸開線
直線の軌跡
standingwave-reflection-free
アステロイド

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figure_HS_204_1
円の方程式
Christmas illumination
F1 線分の移動でできる円錐
タカダの定理と楕円

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