Answer:
48 feet.
Step-by-step explanation:
The Pythagorean Theorem is:
[tex]a^2+b^2=c^2[/tex]
Plug in the numbers accordingly (it already gives the hypotenuse, "c."):
[tex]16^2+b^2=20^2\\256 + b^2 = 400[/tex]
Subtract 256 from both sides:
[tex]b^2 = 144[/tex]
Take the square root of both sides:
[tex]\sqrt{b^2} = \sqrt{144}[/tex]
b = 12
To find the perimeter, add all the sides together, like so:
20 + 16 + 12 = 48
