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

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ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1342078364411:dw

Malaria
 3 years ago
Best ResponseYou've already chosen the best response.2Arc Length = Radius * Plane Angle Angle must be in radians

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0can you help me out . i dont understand

Malaria
 3 years ago
Best ResponseYou've already chosen the best response.2Convert your angle to radians first. Do you know the formula for that?

Malaria
 3 years ago
Best ResponseYou've already chosen the best response.2I'm here for you, it's not as bad as it looks.

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0no thats the problem

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

Malaria
 3 years ago
Best ResponseYou've already chosen the best response.2Okay, now solve the Arc Length formula for radius

Malaria
 3 years ago
Best ResponseYou've already chosen the best response.2Solve the initial formula for radius: Arc Length = radius * angle

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0486.9468613 = 2.705260341* 180 ?

Malaria
 3 years ago
Best ResponseYou've already chosen the best response.2Hold 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.

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0i dont understand this at alll

Malaria
 3 years ago
Best ResponseYou've already chosen the best response.2Let'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)

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0can yu do for me?

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

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0oh whoops i accidentally mult instead of divide

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0so the answer is 5.175102665 ?

Malaria
 3 years ago
Best ResponseYou've already chosen the best response.2Yes, don't forget to round to the nearest tenth though.
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