If radius r is 1, the area of the circle is:

If radius r is 1, the area of the circle is:

• A. π
• B. 2π
• C. π^2
• D. 1

Answer: (A)

The area of a circle is found using the formula area = π r^2. With a radius of 1, this becomes area = π × 1^2 = π. So the circle’s area is π (about 3.14 square units). The other numbers don’t fit because they would require different radius values or omit the π factor entirely (for example, 2π would need r^2 = 2, π^2 would be squaring π, and 1 would omit the π).

The area of a circle is found using the formula area = π r^2. With a radius of 1, this becomes area = π × 1^2 = π. So the circle’s area is π (about 3.14 square units). The other numbers don’t fit because they would require different radius values or omit the π factor entirely (for example, 2π would need r^2 = 2, π^2 would be squaring π, and 1 would omit the π).