Read the name of the shape. Look at the color next to it, and then color in ALL of the squares that have that shape. 9 Hidden Pictures with 27 Color by Code Worksheets. Each worksheet includes 10 unique problems. All pictures have a colored answer key. Shapes: Triangle, Rectangle, Pentagon, Hexagon, Circle, Oval, Trapezoid, Rhombus, Parallelogram, Square. Please CLICK HERE to view other Math Mystery Picture products