Question

The center of the circle is shown.

Circle with diameter of 1 millimeters.

What is the exact area of the circle?
1/2 π mm²
π mm²
1/4 π mm²
2π mm²

Answer 1

Below

Explanation:

diameter = 1 mm then radius = .5 mm

area = pi r^2

area = pi ( .5)^2 = .25 pi mm^2 or 1/4 pi mm^2