Circle Equation Calculator

Center X-coordinate (h)

Center Y-coordinate (k)

Radius (r)

Circle Equation Forms

Key forms:

Standard Form: (x - h)² + (y - k)² = r²
General Form: x² + y² + Dx + Ey + F = 0
Parametric Form: x = h + r*cos(t), y = k + r*sin(t)
Center: (h, k)
Radius: r

Note: These equations represent the same circle in different forms. The standard form clearly shows the center and radius, while the general form is useful for algebraic manipulations. The parametric form is particularly useful for plotting and animations.