Huanggang 100, the fourth question on page 40 of the ninth grade of Chuangguan Mathematics (Chuangguan Question) 16. How come? (1) (2) (3) Q. It is better to have a process, thank you.
( 1)S 1=S2
(2)s3/(s3+s2)=(fg/cd)^2= 1/4
FG= 1/2CD，AG= 1/2AD
f(4.3)
(3) If it is in the first quadrant E'(6, 15/2)
If in the second quadrant E(-3/2, 15/8)