How to Calculate the Radius of a Circle from a Given Point
Learn how to find the radius of a circle from a point using the distance formula. Simple and clear instructions provided!
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To find the radius of a circle given a point, use the distance formula if you have the center of the circle, too. The formula is:sqrt((x2 - x1)^2 + (y2 - y1)^2), where (x1, y1) is the center and (x2, y2) is the given point. The result is the radius.
FAQs & Answers
- What is the distance formula? The distance formula is sqrt((x2 - x1)^2 + (y2 - y1)^2), used to calculate the distance between two points.
- Why is finding the radius important? Finding the radius is crucial for many geometric calculations, including area, circumference, and understanding circle properties.
- Can you find the radius with only one point? Without the circle's center, you cannot determine the radius; you need both the center and a point on the circumference.