A circle has radius of 7cm. How many degrees is the central angle subtended by an arc of length 5.5 cm?
can anybody help me what this problem all about... I can't understand the problem... Please do illustrate.
thanks
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A circle has radius of 7cm. How many degrees is the central angle subtended by an arc of length 5.5 cm?
can anybody help me what this problem all about... I can't understand the problem... Please do illustrate.
thanks
Hey rcs.
For this you should use the standard arc-length formula which is arc-length = r*theta where r is the radius and theta is the angle sub-tended.
Arc (geometry) - Wikipedia, the free encyclopedia
Quote:
Originally Posted by chiro
I got
Theta = 5.5/7 = .7857... I think it is not right
That is right of the angle is in radians.
In degrees we get:
> 5.5/7
[1] 0.7857143
> 5.5/7*180/pi
[1] 45.01811
or roughly 45 degrees.