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I need help with this question

 

Guest Jun 7, 2018

Best Answer 

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the permiter of a circle is (2* pi*r) but we only have a part of a circle, how much?

well a circle is 360 degrees and we have 135 degrees. so we have 135/360 of a circle.

 

so take the perimiter of a circle 2 * pi * 11

and multiply it by our fraction to get the answer

 

135/360 * 2 * pi * 11 = 25.92

rounded for the circle part of the sector

 

now perimiter is all the sides

 

so just add 11 and 11 to our answer for the other two sides, the radi

 

25.92 + 11 +11 = 47.92 which is greater than 47.5

Guest Jun 7, 2018
 #1
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+1
Best Answer

the permiter of a circle is (2* pi*r) but we only have a part of a circle, how much?

well a circle is 360 degrees and we have 135 degrees. so we have 135/360 of a circle.

 

so take the perimiter of a circle 2 * pi * 11

and multiply it by our fraction to get the answer

 

135/360 * 2 * pi * 11 = 25.92

rounded for the circle part of the sector

 

now perimiter is all the sides

 

so just add 11 and 11 to our answer for the other two sides, the radi

 

25.92 + 11 +11 = 47.92 which is greater than 47.5

Guest Jun 7, 2018

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