Is this triangle a right triangle?

a. yes, because 5^2+12^2=13^2

b. no, because 5^2+12^2=13^2

c. no, because 5^2+12^2≠13^2

d. yes, because 5^2+13^2=12^2

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?