Answer:
15.16047 cm
Step-by-step explanation:
notice that the smaller triangles ratio is 3 : 5
so the bigger triangle's bottom side has length 13 cm
so lets multiply 13 by (3/5)
we get 7.8
we can just use pythagorean theorem to find AB
[tex]\sqrt{x} = 7.8^{2} + 13^{2}[/tex]
15.16047 cm
