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7.2 作三角形的内切圆
Author:
郑凯耀
,
Nenad Đapić
Konstruisati upisanu kružnicu u dati trougao ABC.
GeoGebra
Centar upisane kružnice je u preseku simetrala uglova trougla. Zašto se simetrale uglova seku u jednoj tački? Kako konstruisati poluprečnik upisane kružnice?
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