This hand-drawn classroom-style poster clearly compares 2D (flat) and 3D (solid) shapes using simple notes and friendly doodles. On the left side, it shows 2D shapes like squares, rectangles, triangles, and circles, along with their area and perimeter formulas. On the right side, it presents 3D shapes such as cubes, rectangular prisms, cylinders, and spheres, including their volume and surface area formulas. The design looks like a teacher wrote it by hand on clean white paper, with neat labels