Area and Circumference of Ellipse

Dimensions

a =   , b =  

Area

A = π·a·b4

Circumference

Assume - h = (a – b)²(a + b)²

Using the Ramanujan equation

P = π·(a + b)2·(1 + 3·h10 +  4 – 3·h)

Using series (up to the 4-th member)

P = π·(a + b)2·(1 + 14·h + 164·h² + 1256·h³)