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14.
AC + CD = AD
AD + CD + AC = 10u + 50u
AD + (AC + CD) = 60u
AD + AD = 60u
2AD = 60u
AD = 60u/2 = 30u
15.
x = ángulo
suplemento del ángulo = 180 - x
complemento del ángulo = 90 - x
El suplemento de un ángulo es el triple de su
complemento:
180 - x = 3(90 - x)
180 - x = 270 - 3x
3x - x = 270 - 180
2x = 90
x = 90/2 = 45
suplemento del ángulo = 180 - x = 180 - 45 = 135
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