Practice Test Circle Geometry what the math test assesses build lifelong math skills with these math worksheets hints are available if you a circle is represented by the equation x2 + (y + 3)2 = 13 a circle is represented by the equation x2 + (y + 3)2 = 13. 4 practice test key ch math comic #308 - "snowman" (2-6-18) here a practice test to review circles properties gmat …