Question

Can someone give me the answers

Answer 1

1-the radius of the is 12 so AO is twelve,too.
now you can get help from ThePythagorean Proposition

`{x}^(2) = {16}^(2) + {12}^(2)`
the answer will be 20
so it means that the ABO triangle is a right triangle. so angle A is a right angle
it means that AB is tangent.
2-
circumference:18.85
area: 28.27

3-

`c > b > a`
hope this helps