Job Recruitment Website - Property management - Dalian Ding Dian Property

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=