Study Set:
+15 Math Questions for SAT Prep - Group 2

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

**26**

Completing the square yields the equation (x-3)^2 +(y+4)^2 = 169.

the standard form of an equation of the circle. Understanding this form results in the equation **r^2=169**, which when solved for **r** gives the value of the radius as 13. The diameter is twice the value of the radius; therefore, the diameter is 26.

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