Contact us
Choose a category below so we can get back to you as quickly as possible.
證:∵D,E分別為邊AB,BC的中點 ∴DE//AC,DE=1/2AC,又∵CF=2/1AC ∴DE平行且等於CF ∴四邊形CDEF為平行四邊形 ∴DC=EF
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.