If the diameter of the circle is above 20mm what is the area

A≈3.14*10-4m² there you go!

The area of the circle is 314mm²

Step-by-step explanation:

To solve this problem we have to use the formula for calculating the area of a circle

a = area

π = 3.14

r = radius

d = diameter

r = d/2

r = 20mm / 2

r = 10mm

a = π * r²

we replace the known values

a = 3.14 * (10mm) ²

a = 3.14 * 100mm²

a = 314mm²

The area of the circle is 314mm²