Posted by Anne on Tuesday, December 7, 2010 at 9:20pm.
I don't understand how to find the aproximate area of a shaded region
This problem has a big cirlce with 1/4 shadded with a radius of 20 cm.
the answer chocies are
A. 90 cm squared
B. 270 cm squared
C. 314 cm squared
D. 1.256 cm squared
how do I find the answer?

Math question  Bob, Tuesday, December 7, 2010 at 9:27pm
pi*r^2
3.14*20cm.^2
=1256.63
take that and divide by four and you get 314.16

Math question  Danny, Tuesday, December 7, 2010 at 9:34pm
I don't understand how you got 1256.63

Math question  Anna, Tuesday, December 7, 2010 at 9:37pm
I don't either I got 62.8
Answer This Question
Related Questions
 math geometry  I will try and explain this since I can't draw the picture ...
 trig  Both circles have the same center and radius of the larger cirlce is R. ...
 Geometry  Please Please HELP!!!! I need the answer to this and i've worked it ...
 Geometry (PLEASE HELP!!!)  Please Please HELP!!!! I need the answer to this and...
 statistics finding the shaded region  Find the area of the shaded region. The ...
 math  A rectangle is removed from a right triangle to create the shaded region ...
 Math  Marian drew a picture of two circles.She wanted to shade only the outer ...
 Math  The radius of the larger circle is 9cm. The diameter of the smaller ...
 Geometry  ABGF is a square with half the perimeter of square ACDE. GD = 4in. ...
 Math  A triangle is placed in a semicircle with a radius of 3cm, as shown below...
More Related Questions