SOLUTION: Find the area of x^2 +y^2=4. Find the circumference of x^2 + y^2 =4.

Algebra ->  Circles -> SOLUTION: Find the area of x^2 +y^2=4. Find the circumference of x^2 + y^2 =4.       Log On


   

Question 1073677: Find the area of x^2 +y^2=4.
Find the circumference of x^2 + y^2 =4.

Answer by ikleyn(52794) About Me  (Show Source):
You can put this solution on YOUR website!
.
It is the circle of the radius 2.


The area is pi%2Ar%5E2 = 3.14%2A4.


Use your calculator.


The circumference is 2%2Api%2Ar = 2%2A3.14%2A2 = the same number.