A square is a shape with four equal sides and four corners (right angles). All sides are the same length. Children learn to find and identify squares in the world around them.
A square is a shape you can find all around you — on windows, crackers, tiles, sticky notes, and picture frames. What makes a square different from other shapes is two things working together: it has four sides that are all the same length, and it has four corners that all look the same, like the corner of a piece of paper. If all four sides match and all four corners match, the shape is a square.
One good way to check whether a shape is a square is to look at its sides. Imagine walking around the edge of the shape: each side should feel the same length as the one before it. If you had a ruler, all four measurements would show the same number. If one side is longer or shorter than the others, it is not a square — it might be a rectangle, which also has four matching corners but has sides that come in two different lengths instead of all four the same.
Squares can be in different positions and still be squares. A square that is tilted sideways or resting on one of its corners is still a square — it still has four equal sides and four matching corners. The shape does not change just because it is turned around. Try to notice squares in the world in lots of different positions, not just sitting flat like a box.
When you look for squares, you are practicing an important math skill: noticing what shapes have in common even when they look different in other ways. A window and a cracker and a floor tile might be different sizes and made of different materials, but they share the same shape. Squares are one of the most common shapes that people build and make, because their equal sides and matching corners make them easy to stack, fit together, and measure.
This is a foundational topic with no prerequisites.
No prerequisites — this is a starting point.