Question

The area of the circle whose centre is at (1, 2) and which passes through the point (4, 6) is

• A. $5\pi$
• B. $10\pi$
• C. $25\pi$
• D. None of these

Answer 1

The correct option is C $25\pi$

Radius = $\sqrt{(1–4{)}^2+(2-6{)}^2}=5$
Hence the area is given by $\pi r^2=25\pi$ sq. units.