Circumference & Area of Circles

Question 1

the circumference is what of a circle?

Answer 1

the perimeter

Question 2

how to find the circumference of a circle?

Answer 2

diameter x π

Question 3

how to find the area of a circle?

Answer 3

R² x π

Question 4

how to find the area of a circle when x is given?
example question= area is 20cm2

Answer 4

20= R²x π
20/π= R²
R²= 6.366196624
√6.366196624
x= 2.5