What is a circle?

A circle is a perfectly round shape where all points are equidistant from its center. This distance is known as the radius, while the diameter—twice the radius—runs through the center and connects two points on the circle's edge. Circles pop up everywhere in daily life, from the wheels on our cars to the coasters we use at home, emphasizing their practical significance beyond pure mathematics! When drawing a circle, one common pitfall is trying to freehand it without any tools! To avoid this, use a compass or trace around any circular object like a cup. Another tip is to remember that a circle holds an infinite number of points, but when calculating area (A = πr²) or circumference (C = 2πr), you only need the radius. Happy circling!