👉 Node: A node is a unit of measurement in mathematics and physics. It represents one of the fundamental units of length, mass, and time. Diameter: The diameter of a circle is the distance across its circumference. In geometry, it is defined as 2r, where r is the radius of the circle. Radius: The radius of a circle is the distance from its center to any point on the circle's surface. It can be calculated using the formula πd, where d is
