Can someone answer the question that's circled?

What is the measure of ac? 5 units 13 units 26 units 39 units

What describes horizontal cross section of the right rectangle 6m 8m 5m

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