radius of circle = 8 and central angle has a measure of 90 degrees. what is arc length? (Is my answer right) I put 90 divided by 16 times 3.14 and got 17.66.

Question

lucaz · Answer

arc length= theta(radians) x radius

lucaz · Answer

90 deg x 2pi / 360 deg = 1.57
arc=1.57 x 8

anonymous · Answer

I dont think it's over 360, but 180

anonymous · Answer

attachment

anonymous · Answer

here are the choices .25 * 16 pi, 16, .25 * 8 pi, 64 pi, or none of above... I think it's none of above

anonymous · Answer

So it would be (90 * 8 * pi)/360, right?

720pi/360 = 2pi

lucaz · Answer

its .25 pi * 8

anonymous · Answer

Can you show how to get to that conclusion @lucaz ?

lucaz · Answer

90/360=.25

lucaz · Answer

.25pi * 8 is the arc

anonymous · Answer

Yea, that's right, for sure. Thanks for the help!

lucaz · Answer

no problem

anonymous · Answer

Thanks so much!

triciaal · Answer

no its 0.25*2*pi*8

lucaz · Answer

I forgot the 2, @triciaal  is right

anonymous · Answer

oh, well I eventually figured it out from Cosmi, but you did a great job too, Thanks Triciaal!

triciaal · Answer

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