Respostas

2013-11-21T11:04:54-02:00
Ast = (pi.r.alfa)/360
Ast = (pi.6.30)/360
Ast = (pi.6)/12
Ast = pi/2

Comprimento do arco:
L = (pi.r.alfa)/180
L = (pi.6.30)/180
L = (pi.180)/180
L = pi

Perímetro = pi/2 + pi = 3pi/2
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