如图,在 ΔABC中, D在 AC上, DE//BC, DF//AB.
(1)求证: ΔDFC∽ΔAED;
(2)若 CD=13AC,求 SΔDFCSΔAED的值.
1-(-1)×(-1)-(-1)×0×(-1)
(-10)××0.1×6
│-2│-(-)+1-│1-│
0-21+(+3)-(-)-(+)
(3-5)-(6-10)