What is the approximate area of the shaded region?

A.
104.86 cm²

B.
87.47 cm²

C.
27.02 cm²

D.
10.54 cm²

Question

What is the approximate area of the shaded region?		
  

 
 A.
104.86 cm²
 
 B.
87.47 cm²
 
 C.
27.02 cm²
 
 D.
10.54 cm²

gamereternity · Answer

gamereternity · Answer

@Hero

jtug6 · Answer

I'd recommend calculating the area of the circle and then subtracting it from the square. Do you know the area of a circle?

gamereternity · Answer

the area of the circle is 21.98

jtug6 · Answer

Not quite. The area of a circle is pi * r^2. Our diamater is 7, so our radius is half that, which is 3.5. So what's pi(3.5^2)?

gamereternity · Answer

isnt the answer c

jtug6 · Answer

Just work with me. The area of a circle is pi(3.5^2). What is that? Use pi = 3.14.

gamereternity · Answer

so that equals 21.98

gamereternity · Answer

7x7=49-21.98=c

jtug6 · Answer

It's 38.48, not 21.98. pi(3.5^2) is pi(12.25) = 38.48 or so

jtug6 · Answer

but your method of solving is correct. 49 is the area of the square so that minus 38.48 is roughly...?

gamereternity · Answer

3.5x3.14=10.99x2=21.98

jtug6 · Answer

Youre taking the radius and multiplying it pi and then squaring that. It's actually pi times the radius squared.

jtug6 · Answer

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