Respuesta:
4.5
Explicación paso a paso:
Sea:
BD = 5k
CD = 3k
De la Figura:
BD = BC + CD
5k = BC + 3k
BC = 2k
Además:
AC = AB + BC
7 = 4 + 2k
7 - 4 = 2k
3 = 2k
k = 1.5
Entonces:
CD = 3k = 3(1.5) = 4.5
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Respuesta:
4.5
Explicación paso a paso:
Sea:
BD = 5k
CD = 3k
De la Figura:
BD = BC + CD
5k = BC + 3k
BC = 2k
Además:
AC = AB + BC
7 = 4 + 2k
7 - 4 = 2k
3 = 2k
k = 1.5
Entonces:
CD = 3k = 3(1.5) = 4.5