Find the area of largest circle inscribed in ellipse | PHP program to find the area of the circle ; Area of the Reuleaux triangle ; Driver Code
< ? php $ GLOBALS [ ' pi ' ] = 3.1415926 ; function areaCircle ( $ b ) { $ area = $ GLOBALS [ ' pi ' ] * $ b * $ b ; return $ area ; } $ a = 10 ; $ b = 8 ; echo round ( areaCircle ( $ b ) , 3 ) ; ? >