![]() ![]() The radius is represented by the lowercase letter \(r\).ĭiameter is the full length of the circle running from the edge, through the midpoint, all the way to the other side. Radius is the length from the midpoint of the circle to the outer edge of the circle. The midpoint is the exact center of the circle, where the dot is. Definitions Midpoint of a Circleįirst, let’s define midpoint, so you’ll understand what I’m talking about as I reference it. So, now, let’s take a look what each of these measurements represent. ![]() Things like radius, diameter, and circumference are terms that helps us to keep track of various measurements of a circle. As people began to see the value and use for circular-shaped objects, they begin to study circles. ![]() Then, 300 years later, they were used for the wheels of chariots. The first technological invention using a circular shape, however, wasn’t until 3500 BC, and it was the invention of the potter’s wheel. People were able to see natural circles by observing the moon, the sun, and other various naturally circular shapes. Hey guys! Welcome to this video on the radius, diameter, and circumference of a circle.Ĭircles have been around for as long as the Earth has been around. ![]()
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