How to Calculate Radius Using Circumference and Area
Learn to calculate the radius of a circle without needing the diameter using circumference or area formulas.
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To calculate the radius without the diameter, use the circumference or area. If you have the circumference (C), use the formula radius = C / (2π). If you know the area (A) of the circle, use radius = √(A / π). These formulas allow you to find the radius without needing the diameter directly.
FAQs & Answers
- What formula do I use to find the radius from the circumference? Use radius = C / (2π), where C is the circumference of the circle.
- Can I calculate the radius if I know the area? Yes, use the formula radius = √(A / π), where A is the area of the circle.
- Is it possible to find the radius using the diameter? Yes, the radius is half of the diameter: radius = diameter / 2.
- What is the importance of understanding radius in geometry? Understanding radius is crucial in many geometric calculations, including determining other properties of circles and related shapes.