please help me on this will give you brainliest

Answer:
x=6
Step-by-step explanation:
The pythagorean theorem:
a^2+b^2=c^2
a=8, c=10
8^2+b^2=10^2
64+b^2=100
b^2=100-64
b^2=36
b=6
Answer:
6
Step-by-step explanation:
a^2+b^2=c^2
8^2+b^2=10^2
64+b^2=100
b^2=36
b= 6