Posted by **katie** on Friday, April 20, 2007 at 8:04pm.

O is the centre of the circle and A and B are points on the circumference of the circle. The radians of the circle is 12 cm and the angle AOB is 54 degrees. Choose the one option which gives the length of the circle joining A and B , correct to one decimal place.

A. 10.6 m

B. 10.8 m

C. 10.9 m

D. 11.0 m

E. 11.2 m

F. 11.3 m

G. 11.5 m

H. 11.7 m

what is it?

assuming that by "radian" you mean "radius" and by "length of circle" you mean "length of arc", then you can figure out the circumference of the circle

12(radius) x 2 x pi = 24 pi = C

54 is .15 of 360, so taking .15 of 24 pi would be 3.6 pi.

if you need exact(rounded to tenths, just multiply by pi and round, you get 11.3 cm)

hope this helped

ah.. sorry, it's F.

(forgot to specify which answer, though i'm sure you're smart enough to figure that out on your own)

lol yes i cod have worked that out myself.. thanks for ur help

## Answer this Question

## Related Questions

- can xome1 help me plzz im stuck - HELP PLZZ...A circle has radius 2 cm,(in that ...
- maths-Circles - O is the centre of a circle which has two chords BA and BC with ...
- maths - Im confused can any1 help me on this question ?? or try and put me on ...
- maths - 1) Circle centre (7,-2) passes through (-2,10). Calculate radius and ...
- math - can u help this the qustion is : A circle passes through the points (1,4...
- steev - can u help this the qustion is : A circle passes through the points (1,4...
- trigonometry - A sector AOB of a circle, centre O, radius r cm, where the acute ...
- Maths Help - A,B,C,D,E,F are 6 consecutive points on the circumference of a ...
- Geometry - Triangle RSU has two of its points(R and S) on the sides of a circle...
- maths - ABC is the segment of a circle with center O. This segment is enclosed ...

More Related Questions