The area of a circle is A=πr². Since π is about 3.14 we can substitute that into the equation. So A=3.14×r² We can substitute the given radius for r. A= 3.14 × 5² When a number is squared, or has the two over it, we multiply it by itself. 5 × 5= 25 A= 3.14 × 25 Simplify this and the area of the circle is about 78.5 A≈78.5