∮ ab = CB, ∮ ABC = ∮ CBE = 90, GB=EB,
△ABG 와 △ 기원전,
∵ ∫AB = CB∠ABG =∠CBE GB = EB,
∯ △ abg ∯ △ BCE (SAS),
∮ bag = ∮ BCE;
(2) 연결 교류,
From (1):: bag = BCE,
∮ bag+∮ beh = ∮ BCE+∮ beh =180-∮ CBE = 90,
∮ ahe =180-((가방+베이) =90
∮ agb = ∮ CGH,
∯ △ agb ∯ △ CGH,
∮ ∴AGCG=BGHG,
∮ ∴HGCG=BGAG,
∮ bgh = ∮ AGC,
∯ △ bgh ∯ △ AGC,
∮ ∴BHAC=BGAG,
바로 BH? AG=AC? BG,
Rt△AHE 와 Rt△ABG 에서 ,
* cosHAE = AHAE = ABAG,
≈ 아? AG=AB? AE,
≈ BH? 아가? AG=AC? BGAB? AE,
≈ ∴BHAH=AC? BGAB(AB+BE),
AB = 2BG,
∮ ∴BHAH=2AB? BGAB? 3BG = 23
(3) 부터 (2): BHAH=AC? BGAB(AB+BE),
AB = kBG,
∮ ∮ ∮ bhah =