Question

Write the standard for equation of a circle with a center of (0,0) and a point on the circle at -4,3

Answer 1

To find the radius you use distance formula:
Square root of ((-4-0)^2 + (3-0)^2)=5
Using the Standard equation of a circle you substitue the values: (x-0)^2+(y-0)^2=5^2
And you get x^2+y^2=25