Question 437230
<br>
The use of trigonometry to solve the problem is a bit excessive -- unless a solution using trigonometry is required....<br>
The problem simply involves a right triangle with hypotenuse 80 and one leg 20.  The answer to the question is the length of the other leg, which can be found using the Pythagorean Theorem.<br>
{{{x^2+20^2=80^2}}}
{{{x^2+400=6400}}}
{{{x^2=6000}}}<br>
Use a calculator to find...<br>
ANSWER: (to 2 decimal places) 77.46 feet<br>