input = gets.split(" ")
a = input[0].to_f
b = input[1].to_f
c = input[2].to_f

s = (1.0/2.0)*a*b*Math.sin(c*Math::PI/180)
l = a + b + Math.sqrt( a**2 + b**2 - 2*a*b*Math.cos(c*Math::PI/180) )
h = b*Math.sin(c*Math::PI/180)

puts "%.8f" % s
puts "%.8f" % l
puts "%.8f" % h

