## ✒️CIRCLE EQUATIONS

### Part A:

### Part B:

**For ****Part ****A ****and ****B****:**** **The equation of the circle in standard form is written as:

Where (h,k) is the center and r is the radius. Substitute each given to get its equation.

## “Part A”

### Number 1:

### Number 2:

### Number 3:

### Number 4:

### Number 5:

### Number 6:

## “Part B”

### Number 7:

Substitute the given center in the standard form of the equation.

Find the square of the radius if it passes through (6,2)

Substitute the square of the radius to the equation.

### Number 8:

Substitute the given center in the standard form of the equation.

Find the square of the radius if it passes through (8,-2)

Substitute the square of the radius to the equation.

### Number 9:

Substitute (0,0) as the given center in the standard form of the equation since it is at the origin.

Find the square of the radius if it passes through (4,3)

Substitute the square of the radius to the equation.

### Number 10:

Find the midpoint between the endpoints because that that would be the center of the circle.

Thus, the center is at the origin. Substitute it in the standard form of the equation.

Find the square of the radius if it passes through one of the given endpoints of the diameter: (4,0)

Substitute the square of the radius to the equation.

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