GeoGebra Book: 9点円(三角形の不思議な円)
三角形を探る上で、とても大事な円。
内接円、外接円、傍接円、そして、9点円。
簡単なのに奥が深い。
- Target Group (Age)
- 3 – 19+
- Language
- Japanese / 日本語
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