This reference sheet shows the unit circle with both radian and degree measures shown. On the first page, the unit circle is divided three different ways: 1) the unit circle divided evenly into four sections - only quadrantal angles showing and labeled. 2) the unit circle divided evenly into eight sections - all 45 and 90 degree reference angles shown. 3) the unit circle divided evenly into twelve sections - all 30, 60, and 90 degree reference angles shown. On the second page, there is one large unit circle with all of the 30 degree, 45 degree, 60 degree, and quadrantal angles labeled in both radians and degrees.