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円と接線のワークシート
Author:
井上直紀
GeoGebra
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二次曲線と離心率
対数螺旋
standingwave-reflection-free
正１７角形 作図 regular 17-gon
standingwave-plus
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三角形の心
角の二等分線と比 証明 2
パスカルの定理
ex20170209
Regiomontanusの問題
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Tree Diagrams
Standard Deviation
Area
Congruence
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