Answer:
all you need to do is to multiple
The circumferince of the circle is 2πR ;
The area of the circle is π

;
Then, 2πR = 704 ;
R = 352 / π ;
π

= π × ( 352 / π )^2 = ( 352^2) / π = 123904 / π ≈ 39459.87 ≈ 39460 cm^2 ;
1. GCF is 7 so answer is 7(5+6)
2. GCF is 5 so answer is 5(3+8)
Yes. Both are at a right angle and both have the little tick on line AB and XY, so they must be congruent.
You can subtract 4 from 13 then subtract 4 again