The equation of a circle centered at the origin (0,0) can be expressed using the formula (x^2 + y^2 = r^2), where (r) is the radius. Given that the radius is 2, you substitute (r) into the formula: (x^2 + y^2 = 2^2). This simplifies to (x^2 + y^2 = 4). Thus, the equation of the circle is (x^2 + y^2 = 4).
The equation is: x2+y2 = radius2
x² + y² = 196.
x² + y² = 1.
x² + y² = 49.
x² + y² = 3.
The radius of the circle decreases when you make the circle smaller.
The equation is: x2+y2 = radius2
x2 + y2 =144
x2 + y2 = 400
x² + y² = 196.
x² + y² = 1.
x² + y² = 225.
x² + y² = 49.
x² + y² = 3.
x² + y² = 100.
x² + y² = 64.
x² + y² = 16.