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難問1A
Author:
Bunryu Kamimura
よって、△BEHは直角二等辺三角形になる。
GeoGebra
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standingwave-reflection
standingwave-reflection-fixed
standingwave-reflection-free
円の伸開線
接点の作る円は内接円
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Pentagon
内+外÷2-1になるわけ
倍角と半角
折り返してできる図形2
p124Q3
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Real Numbers
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