Question

find the equation of the circle with
centre (0,2) and radius 2​

Answer 1

Answer:

Equation of a circle is

(x-h)²+(y-k)²=r²......(1)

where,(h,k) is the centre and r is radius.

here,

centre (h,k)=(0,2)

so, h=0

k=2

and radius (R)=2

putting values in (1)

(x-0)²+(y-2)²=2²

x²+(y-2)²=4

x²+y²+4-4y=4

x²+y²-4y=0