Answer:
BE =40
Step-by-step explanation:
Since this is a regular pentagon
BE = BD
3x+4 = 2x+16
Subtract 2x from each side
3x-2x +4 = 2x-2x+16
x+4 = 16
Subtract 4 from each side
x+4-4 = 16-4
x =12
We want to know the length of BE
BE = 3x+4
x=12 so we can substitute it in
3(12) +4
36+4
40
BE =40
