#### What is the radius of a circle whose equation is x2 + y2 + 8x – 6y + 21 = 0? Units

## Which equation represents a circle with a center at 2 8 and a radius of 11?

(x + 2)² + (y – 8)² = 11.

## Which equation represents a circle that contains the Point 2 8 and has a center at 4 0 )?

Which equation represents a circle that contains the point (–2, 8) and has a center at (4, 0)? Distance formula: StartRoot (x 2 minus x 1) squared + (y 2 minus y 1) squared EndRoot (x – 4)2 + y2 = 100 (x – 4)2 + y2 = 10 x2 + (y – 4)² = 10 x2 + (y – 4)² = 100.

## Which equation represents a circle with the same center as the circle shown but with a radius of 2?

Answer Expert Verified The answer answer will be (x-4)2 + (y-5)2 = 4. You get this by using the coordinate of the center of the circle, which is (4,5). Using the center coordinate, h=4 and k=5. Your radius is given as 2 units.

## Which equation represents a circle?

In the diagram, a circle centered at the origin, a right triangle, and the Pythagorean theorem are used to derive the equation of a circle, x2 + y2 = r2.

## Which equation represents a circle with the same radius as the circle shown but with a center at (- 1 1?

(x – h)² + (y – k)² = r² The (h,k) are co-ordinate of your centre of circle, which in this case is (-1,1) and r is the radius of circle.

## Does the Point 2 Startroot 6 Endroot lie on the circle shown explain?

Answer: The point not lie on the circle, because the distance from (0, 0) to (2, square root 6 ) is not 3 units.

## Which equation represents a circle with the same center?

The equation of a circle: (x – h)² + (y – k)² = r², where (h,k) is the center and r is the radius of the circle.