Question

find the circle with center origin and passing through (-1,2) is?​

Answer 1

Step-by-step explanation:

C (0,0) , P(-1, 2)

r = √(-1)² + 2²

r = √5

equation of the circle with center at origin is,

x² + y² = r²

x² + y² = (√5)²

x² + y² = 5