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如图,圆O1与O2相交于A,B两点,AB是圆O2的直径,过A点作圆O1的切线交圆O2于点E,并与BO1的延长线交于点P,

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如图,圆O1与O2相交于A,B两点,AB是圆O2的直径,过A点作圆O1的切线交圆O2于点E,并与BO1的延长线交于点P,
PB分别与圆O1、圆O2交于C、D两点,若AD=6,则AE=(     )
如图,圆O1与O2相交于A,B两点,AB是圆O2的直径,过A点作圆O1的切线交圆O2于点E,并与BO1的延长线交于点P,
(1)证明:在圆O2弧BC角落角度行政首长协调会=角CAB
圆O1,AC切弧AB对应的角度:角度ADB =角CAB
:角度行政首长协调会=角ADB
AD∥EC(因为内角相等).
(2),在圆O2:EP * PB = AP * PC:EP * PB = 6 * 2 = 12 .该.1
AD∥EC,EP / PD = CP / PA = 2/6...........2
PD = PB + BD
代风格:
2/6 = PE / *(PB +9)
PB = 3PE-9 ..3
3代入公式:
PE *(3PE)= 12
PE ^ 2-3PE-4 =
PE = 4或PE = -1的(家庭)
PB = 3PE 9 = 3 * 4 -9 = 3
ED = EP + PB + BD = 4 +3 +9 = 16
由于广告?是圆O2的切线,所以AD ^ 2 = DB * ED = 9 * 16
AD = 3 * 4 = 12