Question

find length of arc AB.

Answer 1

So I think the arc AC = 120 degrees?? to start the problem

Answer 2

it looks like a 60 degrees

Answer 3

because the angle is smaller than 90

Answer 4

so you do
angleAOB=180-60
=120

Answer 5

I think I am getting confused with another formula because I didn't think it looked right. Since 1/2 the circle should add to 180 and that didn't leave a big enough# for the larger arc. THanks!

Answer 6

120/360 x pi r^2

Answer 7

wait

Answer 8

no i meant

Answer 9

120/360 x 2pi x r

Answer 10

that angle BOA should be 120 degrees right

Answer 11

yes

Answer 12

what is that formula the last one you wrote called?

Answer 13

circumference formula

Answer 14

but I just need the measurement of the arc AB

Answer 15

i think the measurement of the angle BOA = 120 and therefore the arc AB is 120. what do you think?

Answer 16

r u finding the angle or the length

Answer 17

nope. @craycray_fabster is right. the measure of the arc is 120, but the arc length is not

Answer 18

find length of arc AB is what the question is