Respuesta:
Dato: M y N puntos medios de AC y BD
AM = NC = a, BN = ND = b
Dato: AB + CD = 60
(a + x - b) + (x + b - a) = 60
2x = 60
x = 30
MN = 30 ; Rpta. C
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Respuesta:
Dato: M y N puntos medios de AC y BD
AM = NC = a, BN = ND = b
Dato: AB + CD = 60
(a + x - b) + (x + b - a) = 60
2x = 60
x = 30
MN = 30 ; Rpta. C