Give a seven-year-old two identical rectangles, one lying flat and one standing up, and ask if they match. Many will say no, because one looks taller. This 2nd grade congruent shapes worksheet works right on that hunch. A short note at the top gives the rule: two shapes are congruent when they have the same size and the same shape. Then eight pairs follow, labeled a to h, each with two boxes to tick: Congruent or Not congruent. Some pairs are simply turned or moved. Others differ in size or in the number of sides. A second page gives the answer key.