Give a six-year-old a sheet of paper and ask for a corner, and they will touch it at once. However, ask whether a triangle can have that same kind of corner, and the answer often becomes a shrug. This 1st grade find the square corners worksheet turns the shrug into a test. On the left side, three boxes each hold two outline shapes, such as a trapezoid and a square. The child colors the one with a square corner. On the right side, three more pairs of colored shapes come with a question about square corners. Then the child ticks yes or no. A second page gives the answer key.