Question

http://tinypic.com/r/14p2pz/6 please need help withthis question

Answer 1

I would say you should start by dividing this circle up into different percentages. so 2x+x+3x =1 or if you want degrees: 2x+x+3x =360 then you can find out what percentage the arc is of the whole circle.

Answer 2

like
ok i have
an answer down and i got 13.67 but it says its inccorect
when i put it in?

Answer 3

ik x=60 degrees and i set it up in a proportion

Answer 4

solve for x
2x+ x = 180
3x= 180
x = 60
so the angle of arc ab is 60(2) = 120

using the equation of arc length
n/360(2piR) = arc length

so it is 120/360(2pi(r)) = 28.61
solve for r
r is around 13.66

the circumference is 2pir
so its 2pi(13.66)
so your answer is around 85.83

Answer 5

w0www so sorry i got that answer its just i made it so complicated im sorry thanks for helping me out i got right answer now! ty

Answer 6

So yes you got x=60 degrees right. now if x = 60 degrees. then the length that arc AB is taking up is 120 degrees or 1/3 of the circle. so since you know that arc AB is 1/3 of the circle you can then multiply that length by 3 to find the circumference.