Math Problem Statement
Find the radius of a circle that passes through the points (5, 0), (8, 1), and (6, 0).
Solution
To find the radius of the circle passing through the points , , and , we need to determine the center of the circle first, and then calculate the radius. Here's the step-by-step solution:
Step 1: General Equation of a Circle
The general equation of a circle is: where is the center of the circle and is the radius.
Step 2: Set up the System of Equations
Since the circle passes through the points , , and , we can plug these points into the circle equation:
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For :
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For :
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For :
Step 3: Simplify the Equations
Expand each of the equations:
Step 4: Eliminate by Subtracting Equations
Subtract equation 1 from equation 3: Simplifying:
Subtract equation 1 from equation 2: Simplifying:
Step 5: Solve for
Substitute into the equation :
Step 6: Calculate the Radius
Substitute and into one of the original equations, say: Simplify:
Thus, the radius of the circle is .
Would you like any further details or have any questions?
Here are five related questions:
- How do you find the equation of the circle given three points?
- Can the radius be negative?
- How does one determine if three points are collinear?
- What is the significance of the perpendicular bisectors of chords in a circle?
- How would the problem change if one of the points was on the origin?
Tip: For any circle, the perpendicular bisectors of any two chords intersect at the circle's center.
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Math Problem Analysis
Mathematical Concepts
Coordinate Geometry
Circle Equations
System of Equations
Formulas
General Equation of a Circle
Distance Formula
Quadratic Equation
Theorems
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Suitable Grade Level
Grades 10-12
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