Problem: Quadrilateral ABCD is inscribed in a circle with side AD, a diameter of length 4. If sides AB and BC each have length 1, then side CD has length
Answer Choices:
A. 27​
B. 252​​
C. 11​
D. 13​
E. 23​
Solution:
Draw radius OB which is perpendicular to and bisects chord AC at G. Side CD is parallel to and has length twice that of segment GO. Similar right triangles BGA and ABD yield
