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A circle with a shaded sector is shown.


a. What is the area of the shaded sector?

b. What is the length of the arc that outlines this sector?
 

 May 22, 2020
 #1
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50/360 = 5/36.

 

The shaded is 5/36 of the total circle.

 

Thus, 2^2 π = 4π, so 20π/36 = 10π/18 = 5π/9

 

That's the area of the shaded.

 

As I said, the shaded accounts for 5/36, so the arc counts for 5/36 of the circumference. The way to measure that is 2πr. = 2π*2. I believe you can do this by yourself. It's pretty easy to multiply a number by a fraction:)

 

If you don't understand anything feel free to ask!!!

 

laugh

 
 May 22, 2020

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