What is quadrilateral?

A quadrilateral is a shape with four straight sides and four corners, just like a rectangle or a square.

Imagine you have a piece of paper. If you draw four lines, one on the top, one on the bottom, one on the left, and one on the right, and connect them so they make a closed shape, that's a quadrilateral! Think of it like a cookie cutter with four sides. You can press it into dough and get shapes like squares, rectangles, diamonds, or even trapezoids.

Not all quadrilaterals are the same. Some have equal sides, some have right angles (like the corners of a book), and others slant in fun ways. For example:

• A square has four equal sides and four right angles.
• A rectangle has opposite sides that are equal and four right angles.
• A rhombus looks like a diamond, all sides are the same length, but the angles can be different.

So, whenever you see something with four straight sides and four corners, whether it’s your favorite puzzle piece or a window in a house, you're looking at a quadrilateral!