Equation of a Circle

Front

What is the standard equation of a circle with center (h, k) and radius r?

Back

(x - h)² + (y - k)² = r²

Front

What is the center of the circle in the equation (x - 4)² + (y + 2)² = 9?

Back

(4, -2)

Front

What is the radius of the circle in the equation (x + 1)² + (y - 3)² = 16?

Back

4

Front

What is the equation of a circle with center at the origin and radius 5?

Back

x² + y² = 25

Front

In the equation (x - 1)² + (y + 3)² = 25, what is the diameter of the circle?

Back

10

Front

What is the center of the circle described by the equation x² + y² = 36?

Back

(0, 0)

Front

What is the radius of the circle in the equation (x + 2)² + (y - 1)² = 49?

Back

7

Front

What is the equation of a circle with a diameter of 10 and center at (2, -3)?

Back

(x - 2)² + (y + 3)² = 25

Front

In the equation (x - 5)² + (y + 1)² = 64, what is the center of the circle?

Back

(5, -1)

Front

What is the radius of the circle in the equation (x + 3)² + (y - 4)² = 81?

Back

9