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Desabatimiento triángulo
saradelgador
4/7/21
664
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Answer
Solution
}
}
}
}
}
}
}
}
}
c'
r'
r
(r)
a
b
b'
a'
P'
P
v'
v
(v)
(P')
(a)
(b)
(c)
=c
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