What is the equation of this circle?
What is the equation of this circle?
What is the equation of this circle?
What is the equation of this circle?
What happens to the radius in the equation? Change the radius a few times more to verify your answer.
What is the new circle equation?
[math]\left(x-6\right)^2+y^2=9[/math]
What is the new circle equation?
[math]\left(x+2\right)^2+y^2=9[/math]
What happened to the equation when the x coordinate of the center is positive? How about when it is negative?
If x is positive it is subtracted from the x if it is negative it is added to the x.
What are the two new equations?
[math]x^2+\left(y-3\right)^2=9[/math][br][math]x^2+\left(y+5\right)^2=9[/math][br]
What happened to the equation when the y coordinate of the center is positive? How about when it is negative?
If y is positive it is subtracted from the y. if it is negative it is added to the y.
Equation for a circle is [math]\left(x-h\right)^2+\left(y-k\right)^2=r^2[/math], where (h,k) is the center and r is the radius.[br][br]Write the equation of a circle with a center at ( -3, 4) and a radius of 8.
[math]\left(x+3\right)^2+\left(y-4\right)^2=64[/math]