I need help on number 3 I want to make sure I get the right idea on what’s happening

Given the following triangel
Hyp (longest side of the triangle) = 8 ft
Length = 6 ft
Find the base:
To find the missing side of a triangle we use the formula:
[tex]\begin{gathered} a^2+b^2=c^2 \\ \end{gathered}[/tex]