x² + y² = 100
Explanations:The equation of a circle having a center (a, b) and radius, r, is given as:
(x - a)² + (y - b)² = r²
For a circle centered at the origin, the coordinates of the center are (0, 0)
That is, a = 0. b = 0
The equation of the circle therefore becomes:
(x - 0)² + (y - 0)² = r²
x² + y² = r²
the radius, r = 10
x² + y² = 10²
x² + y² = 100its
