How do I find the area of a partial circle ?

Answer 1

Area
r^2[A - sin(A)]/2
r^2arccos([r - h]/r) - (r - h)sqrt(2rh - h^2)
r^2arccos(d/r) - dsqrt(r^2 - d^2)

whereas i'm using A to stand for theta

if you go to the site below, it will tell you how to get whatever you are missing.

Answer 2

well for a whole circle the formula is pi x radius^2

so for a partial circle you find that and divide by 2 if you have a half circle, divide by 3 if you have third of a circle, etc...

Answer 3

Is the partial circle divided by a chord? or sliced like a pie?