Question

if arc XY equals 120 degrees what is the radius of the circle?

Answer 1

\[\theta =arc/r\]

Answer 2

An arc can subtend an angle at the centre.
Otherwise an arc has a length.
So insufficient data.....

Answer 3

I think Nicole is saying the arc is 120.

Answer 4

Insufficient Data...Yeah, that's what I was thinking

Answer 5

120 degrees is a third of 360 so a third of the circumference for the arc is about all you can say.

Answer 6

it also has a 7 ob the arc

Answer 7

ob is on

Answer 8

Ah, OK...so then 7 is a third of the circumference which is 2 pi r and you can do it now, right?

Answer 9

yep the answer was 3.25

Answer 10

That doesn't seem right, if 21 = 2 pi r then r = 21 over 2 pi = 3.342....