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# M:N:SPR:1

SAT

Exam

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PSAT/NMSQT

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PSAT 10

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Calculator: Not Permitted

Additional Topics in Math

Skill

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The equation of a circle in the *xy*-plane is shown above. What is the __diameter __of the circle?

### Select an Answer

Correct Answer:

No

Correct Answer:

No

Correct Answer:

No

Correct Answer:

No

### View Correct Answer

**26**

Completing the square yields the equation the standard form of an equation of the circle. Understanding this form results in the equation which when solved for gives the value of the radius as 13. Diameter is twice the value of the radius; therefore, the diameter is 26.

Question Difficulty:

hard

Objective:

Students must determine a circle property given the equation of the circle.