Find the measure of the line segment DE.
A) 15
B) 13
C) 21
D) 18

Answer:
A) 15
Step-by-step explanation:
triangle DGF ~ triangle LEF
GF/EF=DF/LF
7/6=(4x-1+6)/(11+7)
7/6=(4x+5)/18
4x=16
x=4
DE=4*4 - 1=15