Answer:
1. x = 9.5
Step-by-step explanation:
Number one.
[tex] {a}^{2} + {b}^{2} = {c}^{2} \\ {8.6}^{2} + {b}^{2} = {12.8}^{2} \\ 73.96 + {b}^{2} = 163.84 \\ \frac{ - 73.96 \: \: \: \: \: \: \: \: \: \: = - 73.96}{ {b}^{2} = \sqrt{89.88} } \\ b = 9.5[/tex]
a = leg
b = leg
c = hypotenuse/diagonal
