Posted by **Abigail** on Thursday, March 1, 2007 at 7:40pm.

How do you prove area of a circle?

Integrate an incremental area

dArea = r dr dTheta from r=0 to R, and Theta from zero to 2PI radians.

Area= INT INT dTheta rdr dTheta

Area= 2PI (1/2 R^2)= PI R^2

## Answer this Question

## Related Questions

- Math - Officer Weihe is in a patrol car sitting 25ft from the highway and ...
- calculus - Find circumference of the circle r=2acos theta. s= Int (0 to 2pi) of ...
- Help! Urgent! - You know tangentTheta=h/4 take the derivative sec^2 Theta * ...
- Related rates,...again - I also have another question (I'm not doing too good ...
- rate of change - A missile rises vertically from a point on the ground 75,000 ...
- Calculus - Center of Mass - Find the exact coordinates of the centroid given the...
- Calculus - Find the area between the curve y=4/x and the x-axis from x=1 to x=e...
- Calc - Problems, once again. 1. Compute the average value of: f(x} = x/(x+3) ...
- math - Evaluate the integral upper limit 7pi/4 and lower limit 5pi/4 of 10 csc ...
- derivatives - Applications of derivatives A rectangle has its base on the x axis...

More Related Questions