What Are Circle Formulas?
Definition: Circle formulas are equations designed to calculate aspects of a circle including area, circumference, diameter, and interior angles.
Here are some of the main formulas.
| Diameter of a circle formula | D = 2 × r |
| Circumference of a circle formula | C = 2 × π × |
| Area of a circle formula | A = π × r2 |
Circle Angle Formula
- Central Angle
- Inscribed Angle
- Vertical Angles
- Tangent Chord Angle
- Angle Formed Inside of a Circle by Two Intersecting Chords:
- Angle Formed Outside of a Circle by the Intersection of: “Two Tangents” or “Two Secants” or “a Tangent and a Secant”.