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If arc AB measures 155°, what is the length of the radius of the circle, to the nearest hundredth? drawing pic now.
 one year ago
 one year ago
If arc AB measures 155°, what is the length of the radius of the circle, to the nearest hundredth? drawing pic now.
 one year ago
 one year ago

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ineedhelponmyhwBest ResponseYou've already chosen the best response.0
dw:1342078364411:dw
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
Arc Length = Radius * Plane Angle Angle must be in radians
 one year ago

ineedhelponmyhwBest ResponseYou've already chosen the best response.0
can you help me out . i dont understand
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
Convert your angle to radians first. Do you know the formula for that?
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
I'm here for you, it's not as bad as it looks.
 one year ago

ineedhelponmyhwBest ResponseYou've already chosen the best response.0
no thats the problem
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
Ok, the conversion for degrees to radians is: \[Angle*\pi/180\]
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
Okay, now solve the Arc Length formula for radius
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
Solve the initial formula for radius: Arc Length = radius * angle
 one year ago

ineedhelponmyhwBest ResponseYou've already chosen the best response.0
486.9468613 = 2.705260341* 180 ?
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
Hold on, I think you're a little confused still. We know the Arc Length: That was given in your drawing as 14cm We know the angle (that you converted to radians) as 2.705260341 What we're looking for is the radius of the circle that fits those conditions. We can use the formula that I have you to find any single piece of the info that we're missing if we're given the other two.
 one year ago

ineedhelponmyhwBest ResponseYou've already chosen the best response.0
i dont understand this at alll
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
Let's call the Arc Length S and the Radius R and the Angle A. So: S=RA Divide through by A to get: S/A = R So the radius of the circle (R) is equal to the arc length (S) divided by the Angle in radians (A)
 one year ago

ineedhelponmyhwBest ResponseYou've already chosen the best response.0
can yu do for me?
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
R = (14)/(2.705260341)
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
When I divide 14 by 2.705260341, I'm getting 5.175. Rounded to the nearest tenth, that should be 5.2
 one year ago

ineedhelponmyhwBest ResponseYou've already chosen the best response.0
oh whoops i accidentally mult instead of divide
 one year ago

ineedhelponmyhwBest ResponseYou've already chosen the best response.0
so the answer is 5.175102665 ?
 one year ago

MalariaBest ResponseYou've already chosen the best response.2
Yes, don't forget to round to the nearest tenth though.
 one year ago
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