# In Real Life, How Are Circles Used?

Circles can be found in everyday life, both in nature and in man-made things. The Manicouagan Reservoir in Canada is a ring-shaped lake that arose from the crater’s remains. The bases of mushrooms with domed tops are round. At amusement parks and carnivals, ferris wheels raise the circle to vertical heights. Many domestic products have circles in their designs, such as cups, candles, and doorknobs.

## What Are Circles and What Do They Mean?

A circle is a geometric object defined as a set of points on the plane that are all equidistant from one another. A series of arcs surrounds the centre point formed by the connected dots. Although there are no straight lines on a circle’s perimeter, straight lines are used in computations. A radius is a line that connects any point on the circle to the centre point. The circumference of a circle is equal to its perimeter.

### Architecture

The use of circles in architecture is common all around the world. Domes, such as those atop the United States Capitol in Washington, D.C., the Duomo of the Florence Cathedral, and St. Peter’s Basilica in Vatican City, are all examples of architectural circles. Architects employ circles as decorative elements in their structures as well. The library at Phillips Exeter Academy in New Hampshire, for example, has tall concrete slabs with circles carved out to allow observers to see the book stacks on each story. Above the entrance door of the Chartres Cathedral in France is a big circular-shaped window.

### Science

The design of particle separators is one application of circles in science. In Europe, the Large Hadron Collider is a circle-shaped tunnel. This form aids in the movement of the particles. Pi, the circumference-to-diameter ratio, is used by NASA in a variety of applications. Calculating trajectories, calculating the size of distant planets, and measuring craters are all part of this.

### Construction

One of the most well-known examples of how circles are employed in construction is the Roman arch. Wedge-shaped blocks were employed by Roman architects to build the arches that supported their vast aqueducts and domed ceilings. The vertical posts and horizontal support beams employed in other buildings couldn’t hold as much weight as these arches could. Because of this, arches are still widely used in construction today.

### Transportation

The development of the wheel is still considered one of the most significant inventions in history. People and things may travel longer distances at higher speeds thanks to this circle. Vehicle tyres, roundabouts on roadways, engine crankshafts, and road layout are all examples of circles in transportation. When calculating distance, GPS also uses circles. It uses a circle theory to identify points and calculate the distance between the satellite and the spot.

### Computer and video games

When creating virtual environments for their games, video game developers use geometric ideas such as circle theorems. This is how the characters’ paths to travel around objects are created. They use their understanding of circles to convert two-dimensional concepts into three-dimensional representations.