Question

(added picture!) PLEASE PLEASE PLEASE HELP!!

Can someone please help me with a step by step of this problem ? I'll seriously appreciate it, and thank you so so so much in advance!!
DON'T ANSWER IF YOU'RE UNSURE!!! I need actual help, please don't just take my points. :c

Answer 1

a square plus b square = c square
(a square plus 6 square =10 square,a)

Answer 2

a²+b²=c²
(6)²+b²=(10)²
36+b²=100
b²=64
b=8

Hope This Helps and God Bless!