Here are some key points about area:
* Units: Area is always expressed in square units. This is because we are measuring the space within a two-dimensional figure.
* Formulae: Different shapes have different formulae to calculate their area. For example, the area of a rectangle is calculated by multiplying its length and width, while the area of a circle is calculated using the formula πr², where r is the radius.
* Additivity: The area of a complex shape can be calculated by dividing it into simpler shapes and adding the areas of those simpler shapes.
* Applications: Area is a fundamental concept in geometry and is used in many real-world applications, such as calculating the amount of paint needed to cover a wall, the amount of carpet needed to cover a floor, or the size of a field.
In essence, area helps us quantify the amount of surface a two-dimensional figure occupies.