A pine tree growing on a hillside makes an angle of 77° with the hill. From a distance of 80 feet up the hill, the angle of elevation to the top of the tree is 63° and the angle of depression to the bottom of the tree is 18°. Find the height of the tree to the nearest tenth of a foot.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.