Square facts for kids
A square is a special kind of shape that has four straight sides, all the same length. It also has four corners, and each corner is a right angle (which means it's exactly 90 degrees). Imagine the corner of a book or a wall – that's a right angle!
The lines that go from one corner to the opposite corner are called diagonals. In a square, these diagonals always cross each other at a right angle too. Also, the angle between any diagonal and a side of the square is always 45 degrees.
A square is very balanced! If you spin it around its center, it looks the same four times in a full circle. This is called rotational symmetry of four. It also has four lines where you could fold it perfectly in half, and both sides would match up. These are its lines of symmetry.
A square is a type of rectangle because it has four right angles. It's also a type of rhombus because all its sides are equal. But remember, not all rectangles or rhombuses are squares! A square is also like the flat, 2D version of a cube.
How to Measure a Square
If you know the length of one side of a square (let's call it 'a'), you can find out other cool things about it!
| What you want to find | How to find it (Formula) |
| Perimeter (distance around the outside) |  |
| Area (space inside the square) |  |
| Length of a diagonal |  |
What if you only know the length of a diagonal (let's call it 'd')? You can still find out the side length, perimeter, and area!
| What you want to find | How to find it (Formula) |
| Length of a side |  |
| Perimeter |  |
| Area |  |
Related pages
Images for kids
-
Square at a given circumcircle
-
Crossed-square
-
3-simplex (3D)
See also
In Spanish: Cuadrado para niños
