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Ello, I just have two questions, thanks for the help

 

1. The area of this circle is 96(pi)m^2.

What is the area of a 30dg sector of this circle?

Options: 4(pi) m^2

              8(pi) m^2

              9(pi) m^2

              16(pi)m^2

 

and 2. A 20dg sector in a circle has an area of 21.5(pi)yd^2. 

What is the area of this circle? Use 3.14 for pi. Answer in decimal form. 

Guest Mar 18, 2017
 #1
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1 - I'm no expert in Trig.

But, Pi =180 degrees, and 30/180 =1/6Pi, then:

96(Pi)m^2 /6 =16(Pi)m^2

 

2 - Do the same thing with 2nd question:

20/180 =1/9. and 1/9 =21.5(Pi)Yd^2, so the area of the circle is:

9 x 21.5 x 3.14 =607.59 Yd^2. Makes sense?.

Guest Mar 18, 2017
 #2
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Yes, thanks so much! 

Guest Mar 18, 2017

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