These ten decoder-style geometry worksheets will provide students with immediate feedback and fun. They are self-checking, and correct answers reveal secret messages. Topics include identifying vertical angles, linear pairs of angles, and congruence. Students will use midsegments of triangles and trapezoids, find parts of isosceles trapezoids, find angles in kites, find measures of arcs and angles when chords are congruent, and find arc length from central and inscribed angles. There are four thorough geometry review puzzles where students work on multiple concepts, and there is much more.