Jerry is building a barn 48 feet wide and 60 feet long. He has the footer laid out. How long should the diagonal of the
footer be if the building is to be square?

Ineed to learn how to solve this problem

The area of a 25-inch tv screen is 300 square inches. the area of a 40-inch tv screen is 768 square inches. the are of the smaller screen is what percent of the area of the larger screen?

If the value of cos330°is√3/2 then find cos 165°.