Question

The area of the circle centred at (1,2) and passing through (4,6) is

Answer 1

radius =  √ { [(4-1)^2] + [(6-2)^2] }
           = √ {(3^2)+(4^22)}
          = √ 25
          =5

Answer 2

Answer: 78.5 sq.units

Step-by-step explanation:

♦Given :- centre = (h,k) = (1,2)

And point on circle = (x,y) = (1,2)

♦Soln.

As we know relation of radius and circle

. , r^2 = (x-h)^2 + (y-k)^2

→Radius, r² = (4-1)^2 + (6-2)^2

→ r² = 9+16

→r² = 25

→R = 5

Area of circle = πr²

. =3.14 × 25

. =78.5

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