Answer:
centre = (1, 3 ) , radius = 2
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
(x - 1)² + (y - 3)² = 4 ← is in standard form
with centre = (1, 3 ) and r = [tex]\sqrt{4}[/tex] = 2
