{"1":{"question":"What is the center of a unit circle?","answer_a":"(1,1)","answer_b":"(0,0)","answer_c":"(0,1)","answer_d":"(1,0))","answer_correct":"B","mcurl":"what-is-a-unit-circle.php"},"2":{"question":"What is the radius of a unit circle?","answer_a":"1\/2","answer_b":"0","answer_c":"1","answer_d":"2","answer_correct":"C","mcurl":"what-is-a-unit-circle.php"},"3":{"question":"What is the equation for a unit circle?","answer_a":"x2<\/sup> + y2<\/sup> = 1\/2","answer_b":"x + y = 0","answer_c":"x2<\/sup> + y2<\/sup> = 1","answer_d":"x2<\/sup> + y2<\/sup> = 0","answer_correct":"C","mcurl":"what-is-a-unit-circle.php"}}ncG1vNJzZmivp6x7rq3ToZqepJWXv6rA2GeaqKVfrLWiwIyiqmaZXaq7qsCMnKCrm5yae7G0z3ierbGgmoqV