Respuesta :

[tex]AC^{2} = AB^{2} + BC^{2}[/tex] (Pythagorean theorem)

[tex]65^{2} = 63^{2} + x^{2} \\[/tex]

4225 = 3969 + [tex]x^{2}[/tex]

[tex]x^{2} = 4225 - 3969[/tex]

[tex]x^{2} = 256[/tex]

x = [tex]\sqrt{256}[/tex]

x = 16 meters

B) 16 meters