Answer:
Step-by-step explanation:
im not sure
x=7
6x-7 and 4x+7 are vertical angles and are thus equal. Then 6x-7 = 4x+7, or 2x = 14.
x = 7.
Answer: 582.7526
p =3,14
r =13,4:2=6.7
r^2=44.89
SA= 3,14*44.89+3,14*6,7*21= 582,7526
check the picture below.