Solucion:

Area: 3.1416 (2.1213)*

= 14.13922885

AOG = l * l

AOG = (4.2626) (4.2626)

AOG = 18.08

 Teorema de Pitagoras: 

r* + r* = 3*

2r* = 9

r* = 9/2

r = Raiz de 4.5

r = 2.121320344