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anonymous
 one year ago
A central angle measuring 120° intercepts an arc in a circle whose radius is 3.
What is length of the arc of the circle formed by this central angle? Round the length of the arc to the nearest hundredth of unit.
6.28 units
12.57 units
9.42 square units
6.28 degrees
anonymous
 one year ago
A central angle measuring 120° intercepts an arc in a circle whose radius is 3. What is length of the arc of the circle formed by this central angle? Round the length of the arc to the nearest hundredth of unit. 6.28 units 12.57 units 9.42 square units 6.28 degrees

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campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0you are after arc length... not area

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Lol thank you , but that choice isnt up there.

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0what fraction of the circle does an angle of 120 form..?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0so an angle of 120 if what fraction of the circle... or revolution...?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0ok... here is what you need dw:1434486024769:dw a circle is 360 degrees so \[Arc ~Length = \frac{\theta}{360} \times 2 \pi r\]

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434486216085:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0this is so confusing , i just dont understand this question period.

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0ok... so you have learnt about the circumference of a circle..?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0its the area of a circle right?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0the arc length is simply the circumference of the whole circle multiplied by the fraction of the circle you are dealing with. so the fraction is \[\frac{Central ~Angle}{360}\]

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0the question is asking for arc length... so the area formula doesn't work. You need circumference.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Like i said 9.42 Square units

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0you are asked for a linear measurement... not an area... so eliminate choice 3.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0campbell my mom got aids from you enough with the boring lectures

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the answers 9.42?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0if you think 9.42 is the answer... then choose it...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0omg i need help , so i dont pick the wrong answer

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0well step 1 do you know how to find the circumference of a circle with radius 3 units?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0ok...do you know what the circumference of a circle is

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the distance around a circle

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0great... and an arc is part of the distance... does that make sense...?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0ok... a fact to remember is that an arc is part of the circumference of a circle... the formula for circumference is \[C = 2 \times \pi \times r\] C = Circumference, r = radius... and pi is a constant = 3.14 so you know r =3 just substitute it and find the circumference...

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0that's the 1st part of the problem

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0what answer did you get..?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0great so the distance around the whole circle is 18.84 units now the central angle is 120 degrees a circle contains 360 degrees so simplify the fraction \[\frac{120}{360}\]

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0Arc Length = fraction x circumference

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0great so the arc length is 1/3 of 18.84 what do you get...?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0so just do 18.84/3 =

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.0is that an answer choice..?
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