Posted by jenna on Monday, July 4, 2011 at 4:00pm.
what is the exact area of a circle with a diameter of 15 inches?

math  Damon, Monday, July 4, 2011 at 4:01pm
radius = 15/2
area = pi r^2 = pi (225/4)

math  jenna, Monday, July 4, 2011 at 4:09pm
so its 225pi sq. in?

math  bobpursley, Monday, July 4, 2011 at 4:42pm
exact? One cannot write down exactly irrational numbers, such as PI.
The exact answer is 225/4 * PI

math  Damon, Monday, July 4, 2011 at 5:01pm
pi r^2 = pi D^2/4 = area of circle
Answer This Question
Related Questions
 summer math hw  one circle has a diameter of 10 inches. a second circle has a ...
 geometry  What is the exact area of a circle with a diameter of 25 inches?
 math  If the number of square inches in the area of a circle is equal to the ...
 math  If the number of square inches in the area of a circle is equal to the ...
 math  If the number of square inches in the area of a circle is equal to the ...
 Math  What is the exact circumference of a circle with a diameter of 21 inches...
 math  what is the exact circumference of a circle with a diameter of 13 inches?
 geometry need help  Claim: the lateral (side ) surface of any area of any ...
 Math  A bakery charges $0.10 for a cookie that is 2 inches in diameter. If the ...
 math  A bakery charges ten cents for a cookie that is 2 inches in diameter. If ...
More Related Questions