Matching activity to help students memorize parts of the unit circle. Page 1 is a blank unit circle with rectangles for where the angles (in radians), and (sin(theta), cos(theta)) values should be placed. The students cut out the rectangular cards with angles (in radians), and (sin(theta), cos(theta)) values printed on them (page 2) and place them in the blank rectangles on page 1. Please note, there are no angles in degrees in this activity, just radians. Page 3 is the answer key, which you could also print and give to the students, after they've practiced, or as a reference sheet. They can reuse the cards and the blank page to practice multiple times over multiple days (and also at home).