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Finding the Center of a Circle

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Finding the Center of a Circle, a selection of answers from the Dr. Math archives.

Finding the Center of a Circle
How can you find the center of a circle using a ruler and compass?

Finding the Center of a Circle from 2 Points
How do you find the centre of a circle if you are given 2 points on the circle and the radius?

Finding the Center of a Circle from 2 Points and Radius
Given two points on a circle and the circle's radius, find the center coordinates of the circle.

Finding the Center of a Circle from Three Points
How can I find the coordinates of the center of a circle, given the coordinates of three points on its circumference?

Finding the Center of a Circle Given 3 Points
How can I find the coordinates of the center of a circle given the x and y coordinates of 3 points that lie on its circumference?

Radius and Center of a Circle from 3 Points
Given the coordinates of three points on a circle, how can you find the center and radius?

Radius, Center of Circle Given 3 Points
What is an easy formula to calculate the center point and radius of a circle given three points on the circumference?

Finding the Radius and Center of a Circle
How do I find the center and radius for the circle defined by the equation x^2 + 8x + y^2 - 6y = 11?

Finding the Center of a Circle
How can I find the center and radius of a circle that is in the form Ax^2 + Cy^2 + Dx + Ey + F = 0?

Finding the Center of a Disk
I need to find the center of a solid disk to bore a hole.

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High School Conic Sections/Circles
Index of Selected Answers to Common Questions

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