Respuesta :

Answer:

[tex] \sqrt{ {3}^{2} + {4}^{2} } = 5[/tex]

using pythagorean theorem a^2+ b^2 =c^2. 3^2 +4^2=c^2 (length of CB). 9+16= 25. so square root 25 is 5 and 5 is your answer