An octagon is a shape that has eight sides and eight angles. It is a type of polygon, which is a flat shape with straight sides. You can often see octagons in everyday life, such as in the shape of a stop sign, which is designed to catch drivers' attention. Each angle in a regular octagon measures 135 degrees, making it a unique and interesting shape in geometry. In architecture and design, octagons are used for various purposes, including buildings and garden layouts. The octagonal shape can create a sense of balance and harmony, making it visually appealing. Additionally, octagons can be found in nature, such as in the structure of some honeycomb cells made by bees.