## What is the formula for area of a polygon?

The formula to calculate the area of a regular polygon is, Area = (number of sides × length of one side × apothem)/2, where the value of apothem can be calculated using the formula, Apothem = [(length of one side)/{2 ×(tan(180/number of sides))}].

**What are shapes with 5 sides?**

A pentagon is a shape with 5 sides and 5 angles.

**What is the formula of area of square and rectangle?**

Area Formulas

Figures | Formula | Variables |
---|---|---|

Rectangle | Area = l × w | l = length w = width |

Square | Area = a 2 | a = sides of square |

Triangle | Area = 1 2 bh | b = base h = height |

Circle | Area = π r 2 | r = radius of circle |

### Why is area of a square?

A square is a 2D figure in which all the sides are of equal measure. Since all the sides are equal, the area would be length times width, which is equal to side × side. Hence, the area of a square is side square.

**What is area of square and rectangle?**

To find the area of a rectangle, multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area. This is the same as saying length2 or length squared.

**How do you find the area of different sides?**

The area of any irregular quadrilateral can be calculated by dividing it into triangles. Example: Find the area of a quadrilateral ABCD whose sides are 9 m, 40 m, 28 m and 15 m respectively and the angle between the first two sides is a right angle. The area of the quadrilateral ABCD =(180+126)=306 square meters.

#### What is area of irregular surface?

The area of an irregular shape is the entire region covered by that shape on a two-dimensional plane. To find the area of an irregular shape, it can be divided into multiple familiar shapes, such as triangles, squares, and rectangles. Then, we can get the total area by adding the area of those smaller shapes.