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Dalian Ding Dian Property
(1) proves that ∵ quadrilateral ABCD and BEFG are both squares,
∴AB=CB,∠ABC=∠CBE=90,GB=EB,
In △ABG and △ BC,
∫AB = CB∠ABG =∠CBE GB = EB,
∴△ABG≌△BCE(SAS),
∴∠bag=∠bce;
(2) the connection communication,
∫from( 1):∠BAG =∠BCE,
∴∠bag+∠beh=∠bce+∠beh= 180-∠CBE = 90,
∴∠ahe= 180-(∠ bag+∠ shell) =90
∠∠AGB =∠CGH,
∴△AGB∽△CGH,
∴AGCG=BGHG,
∴HGCG=BGAG,
∫∠BGH =∠AGC,
∴△BGH∽△AGC,
∴BHAC=BGAG,
Namely BH? AG=AC? BG,
At Rt△AHE and Rt△ABG,
* cosHAE = AHAE = ABAG,
∴AH? AG=AB? AE,
∴BH? AGAH? AG=AC? BGAB? AE,
∴BHAH=AC? BGAB(AB+BE),
AB = 2BG,
∴BHAH=2AB? BGAB? 3BG = 23
(3) From (2): BHAH=AC? BGAB(AB+BE),
AB = kBG,
∴∴BHAH=
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