第1458题：面积之比
如图，在射线 PM,PNPM,PNPM,PN 上分别有点M1,M2,M_1,M_2,M1,M2, N1,N2N_1,N_2N1,N2 四点，则 △PM1N1,△PM2N2\triangle PM_1N_1,\triangle PM_2N_2△PM1N1,△PM2N2 面积之比S△PM1N1S△PM2N2\dfrac{S_{\triangle PM_1N_1}}{S_{\triangle PM_2N_2}}S△PM2N2S△PM1N1=( ) .
A. PM2PM1⋅PN2PN1\dfrac{PM_2}{PM_1} \cdot \dfrac{PN_2}{PN_1} PM1PM2⋅PN1PN2
B. PM1PN2⋅PM2PN1\dfrac{PM_1}{PN_2} \cdot \dfrac{PM_2}{PN_1} PN2PM1⋅PN1PM2
C. PM1PM2⋅PN1PN2\dfrac{PM_1}{PM_2} \cdot \dfrac{PN_1}{PN_2} PM2PM1⋅PN2PN1
D. PN2PM2⋅PN1PM1\dfrac{PN_2}{PM_2} \cdot \dfrac{PN_1}{PM_1} PM2PN2⋅PM1PN1
安卓手机扫描二维码安装App
苹果手机扫描二维码安装App