Question

Circle with diameter of 32 cm. Area.

Answer 1

A= π*r^2
Diameter: 32
32/2= 16
r=16
16^2= 256
256*π = 803.84
Round it down = 803.8
Area = 803.8 cm^2 

Hope I helped! <3

Answer 2

The area of any circle is      (pi) x (radius)² .

"Radius" means half of the diameter,
so the radius of your circle is 16 cm.

You can easily finish the solution from this point.