원이중심을I세꼭지점을abc변의중심을def라고할때, 1.ID=IE=IF 2.∠IAB+∠IBC+∠ICA=90 3.∠BIC=90+1/2∠A 4.AD=AE BD=BF CE=CF 5.△ABC=1/2xrxab+bc+ca
[무물보AI] 답변 로딩중...