The area of a circle can be calculated using the formula A = πr², where A is the area, π (pi) is a constant approximately equal to 3.14, and r is the radius of the circle.
In this case, the radius r is 1. Plugging this value into the formula gives:
A = π(1)² = π(1) = π
Thus, the area of a circle with a radius of 1 is approximately 3.14 square units. This simple formula shows how the size of a circle grows with the square of its radius, making it a fundamental concept in geometry.