Posted by angel on .
a cable attach to the top of a tv antenna is 100 ft. if the cable is fasten to the ground 28 ft from the base of the antenna how tall is the antenna?

geometry 
Ms. Sue,
Use the Pythagorean theorem. Solve for b.
a^2 + b^2 = c^2
28^2 + b^2 = 100^2