We make a right-angled triangle. The formula is simply this. We use the circle formula to calculate the area diameter and circumference of a circle.
General equation of a Circle.
Circle worksheets videos tutorials and formulas involving arcs chords area angles secants and more. X 2 y 2 5 2. Define radius and diameter of a circle. If r is the radius of the circle then the formula for the area and the circumference of a circle are.