如图,已知AB∥CD,AD与BC相交于点P,AB=4,CD=7,AD=10,则AP=( ) A.4011 B.407 C.7011 D.704
问题描述:
如图,已知AB∥CD,AD与BC相交于点P,AB=4,CD=7,AD=10,则AP=( )
A.
40 11
B.
40 7
C.
70 11
D.
70 4
答
∵AB∥CD,
∴
,△APB∽△DPC,
∠A=∠D ∠B=∠C
∴AB:CD=AP:DP=AP:(AD-AP),
即4:7=AP:(10-AP),
∴AP=
.40 11
故选A.