Question

Which of the following could describe the area of a circle with a diameter of 10 units? Choose both that apply!

Answer 1

We know that
[area of a circle]=pi*r²
diameter=10 units
r=diameter/2------> r=10/2----> r=5 units
[area of a circle]=pi*5²------> 25*pi units²------> 78.5 unit²

the answer is
≈78.54 units²
and
 25π units²