I assume has counterclockwise orientation when viewed from above.
By Stokes' theorem,
so we first compute the curl:
Then parameterize by
where the -component is obtained from
with and .
Take the normal vector to to be
Then the line integral is equal in value to the surface integral,
Answer:
27:48
Step-by-step explanation:
(7x-5)+(3x-15)=180°
10x-20=180
10x=200
x=20
(3x-15) + E = 180
3(20)-15 + E = 180
45 + E = 180
E = 135°
FG = EH = 2(y+1)