Answer:
9.3
Step-by-step explanation:
a^2 + b^2 = c^2
hypotenuse is always C, and the other legs are A or B. just replace the letters with the numbers given
A^2 + (13)^2 = 16^2
a^2 + 169 = 256
a ^2 = 256-169
now take square root of both sides
✓87 = 9.3