Question

Diameter =6.6 cm,Area=?

Answer 1

area of circle....πr square
=22/7×3.3×3.3
= 34.22...approx...
hope it help

Answer 2

ANSWER

I think that you want the area of a circle. 

Diameter of the circle = 6.6 cm
Radius of the circle = (6.6 ÷ 2) cm = 3.3 cm
Area of the circle = $\pi r^{2}$
                            = $\pi * (3.3)^{2}$
                            = $\frac{22}{7} * 3.3 * 3.3$
                            = 34.22571... cm²

∴ The area of the circle is 37.22571... cm². 

Hope this may help you. 

If you have any doubt, then you can ask me in the comments.