Students build fluency with the unit circle by solving trigonometric ratio and angle problems to claim squares in this tic-tac-toe challenge. Learners identify sine, cosine, and tangent values at key angles measured in degrees and radians as they compete to line up three squares in a row. This activity supports TEKS G.9.A, G.9.B, and Pre-Calculus P.4.E.
Skills: unit circle values, trigonometric ratios, radian-degree conversion, quick recall. Grades 10-12.