The length of a perpendicular from the base to the top of a plane figure or a solid figure

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

Are the corresponding angles congruent? explain why or why not.