🔵A circle is defined as the set of all points equidistant from a center point
📏The radius is the distance from the center of a circle to any other point on its perimeter
⚪The diameter is twice the length of the radius
📐The circumference is the distance around the perimeter of a circle
🥧Pi (π) is an irrational number approximately equal to 3.14 and represents the ratio of a circle's circumference to its diameter