What is the formula to find the area of a circle?
A circle is formed by the set of points that are at a constant or at a fixed distance (radius) from a fixed point (center) in the plane.
Answer: The area of a circle is pi times the radius squared (A = π r²)
Let's look at an example.
Look a the circle shown below. We will use the formula to find the area of this circle.
Area of a circle = πr2
⇒ π = 3.14
⇒ r = 4 units
⇒ r2 = 16 units2
⇒ A = 3.14 × 16
⇒ A = 50.24 units2
You can also use the Area of a circle calculator to verify your answer.