What is the length of XY? (The Minor Arc) The radius is 12 CM. An the Angle is 90 Degrees.

Question

phi · Answer

did you learn a formula?

anonymous · Answer

No sir, I'm on ApexVS. I failed Geometry, from what I can remember we didnt learn the way of a minor arc. I know how to get the arc length though.

phi · Answer

or you can think like this:
find the length all the way around the circle  (called the circumference)
use C= 2 pi r

can you do that first?

anonymous · Answer

yes it is 75.39

phi · Answer

I know how to get the arc length though.
that is what they want.

the minor arc means the shorter arc between two points  (on a circle you can go the short way or the long way... they want the short way)

phi · Answer

C= 75.40   (you should round 0.398  to 0.40)

 Next,  360º is all the way around. If you go only 90º, what fraction have we gone?

phi · Answer

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