Square ABCD has sides of length 14. A circle is drawn through A and D so that it is tangent to BC, as shown. What is the radius of the circle?

Answer Choices
A. 8.5
B. 8.75
C. 9
D. 9.25
E. 9.5
Square ABCD has sides of length 14. A circle is drawn through A and D so that it is tangent to BC, as shown. What is the radius of the circle?
Answer Choices
A. 8.5
B. 8.75
C. 9
D. 9.25
E. 9.5