Contact us
Choose a category below so we can get back to you as quickly as possible.
∵點M是線段AC的中點,點N是線段BC的中點,∴MN=MC−NC=12AC−12BC=12(AC−BC)=12AB,∵AB=12,∴MN=6.故選A.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.