一个lgebra II : Center and Radius of Circle Functions

Study concepts, example questions & explanations for Algebra II

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Example Questions

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Example Question #21 :Center And Radius Of Circle Functions

Possible Answers:

Correct answer:

Explanation:

When identifying the center of a circle, take the opposite sign of each value connected to x and y.

Example Question #491 :Functions And Graphs

What is the center and radius of the following equation, respectively?

Possible Answers:

Correct answer:

Explanation:

The equation given represents a circle.

represents the center, andis the radius.

The center is at:

Set up an equation to solve the radius.

The radius is:

The answer is:

Example Question #23 :Center And Radius Of Circle Functions

Which of the following represents the formula of a circle with a radius ofcentered at?

Possible Answers:

Correct answer:

Explanation:

Write the standard form for a circle.

The circle is centered at:

The radius is:

Substitute all the known values into the formula.

Simplify this equation.

The answer is:

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