you need to look at the smallest side and make a rectangle with that side. Than you will have some triangles and add that to the rectangle area. If you ask a specific example, i will gladly tell you...
Are of whole circle=TTr^2so... A=TT2^2exponents before multiplying so... A=TT4this is usually written as 4TT so lets write it that way...now you know A=4TTso... if 4TT=12.56637061...lets just say...