# ________________________________, Note: Please answer my question correctly, nonsense answer will be reported. ________________________________ , Lesson: Illustrating the Center-Radius of the Equation of a Circle ________________________________

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Lesson: Illustrating the Center-Radius of the Equation of a Circle ________________________________​ ## ✒️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.

•  (ノ^_^)ノ

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