Answer:
19.6 feet
Step-by-step explanation:
We know that
The hypotenuse is 20 feet, and the bottom leg is 4 feet.
We also know that Pythagorean theorem is used when there is one missing side to a triangle.
[tex]a^{2}[/tex] + [tex]b^{2}[/tex] = [tex]c^{2}[/tex]
Substitute in a for 4 and c for 20. The hypotenuse is always the variable c.
4^2 + b^2 = 20^2
16 + b^2 = 400
b^2=384
[tex]\sqrt{384}[/tex] = 19.6
