I just need help with filling in the blanks please and thank you.

Which of the following can be used to explain a statement in a geometric proof?

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

(x-5)1/2+5=2 what is possible solution of this equation