Question

Jack stands 9 feet away from the primate exposure at the zoo. His lines of sight from the top and bottom of the enclosure form a 90 degree angle. When he looks straight ahead at the enclosure, the vertical distance between his line of sight and the bottom of the enclosure is five feet. What is the height of the enclosure?

Answer 1

Draw yourself a picture

Answer 2

then we can begin

Answer 3

I think it would be helpful if you'd draw it out!