# Essential Geometry Formulae for Various Shapes

Welcome to our comprehensive guide on essential geometry formulas! In this video, we break down the key formulas for various shapes, including Triangles, Squares, Rectangles, Parallelograms, and Circles. Perfect for students and anyone looking to master geometry formulae

MATH TOPICS

## Basic Geometry Formulae for Common Shapes

Understanding the basic geometry formulae for common two-dimensional shapes is essential for a variety of mathematical and practical applications. This section will cover the key formulae for calculating the area, perimeter, and other relevant measurements for triangles, squares, rectangles, parallelograms, and circles.

**Circles, **which are fundamentally different due to their curved nature, require specific formulae:

**Area = π x radius x radius**

**Circumference = 2 x π x radius**

Additionally, the relationship between the radius and diameter is:

**Diameter = 2 x radius**

For triangles, the most fundamental formula for calculating the area is:

**Area = (1/2) x base x height**

Additionally, Heron's formula, which is useful when the lengths of all three sides are known, is given by:

**Area = √[s(s - a)(s - b)(s - c)]**

where *s* is the semi-perimeter of the triangle, calculated as:

**s = (a + b + c) / 2**

**For squares**, the formulae are straightforward:

**Area = side x side**

**Perimeter = 4 x side**

**Rectangles** share similar simplicity in their calculations:

**Area = length x width**

**Perimeter = 2 x (length + width)**

**Parallelograms, **which are often confused with rectangles, have their own set of formulae:

**Area = base x height**

**Perimeter = 2 x (base + side length)**

These formulae serve as the foundation for more complex geometric calculations and are used extensively in various fields such as engineering, architecture, and physics. By mastering these basic geometry formulae, one can efficiently solve a wide range of practical and theoretical problems.