To find the area of a shape, you need to measure its length and width. The area is then calculated by multiplying the length by the width. The standard unit of area is the square meter (m²).
Here are the formulas for finding the area of some common shapes:
- Rectangle: Area = length × width
- Square: Area = side²
- Triangle: Area = ½ × base × height
- Circle: Area = πr²
Here are some examples of how to calculate the area of different shapes:
- Rectangle: A rectangle with a length of 5 meters and a width of 3 meters has an area of 5 m × 3 m = 15 m².
- Square: A square with a side length of 4 meters has an area of 4 m² × 4 m² = 16 m².
- Triangle: A triangle with a base of 6 meters and a height of 3 meters has an area of ½ × 6 m × 3 m = 9 m².
- Circle: A circle with a radius of 2 meters has an area of π × 2 m² = 12.57 m².
If you are measuring the area of a real-world object, you can use a ruler or measuring tape to measure the length and width of the object. Then, simply multiply the two measurements together to find the area.
For more complex shapes, such as irregular polygons, you can use a grid method to estimate the area. To do this, draw a grid over the shape and count the number of grid squares that fall inside the shape. The area of the shape is then estimated by multiplying the number of grid squares by the area of one grid square.