What’s the answer please help

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

In the diagram, gef and hef are congruent. what is the value of x

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet