Answer:
A = 3.14 mm²
Explanation:
The formula for the area of a circle of radius r is A = πr². If your circle has diameter 2 mm, then the radius is half that, or 1 mm. The area of the circle will then be A = (3.14)(1 mm)², or 3.14 mm².
Note: the spelling of π is 'pi,' not 'pie.'