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7.1 作三角形的外接圆
Author:
郑凯耀
,
Nenad Đapić
Konstruisati opisanu kružnicu oko datog trougla ABC.
GeoGebra
Centar opisane kružnice je u preseku simetrala stranica trougla. Zašto se simetrale stranica seku u jednoj tački?
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