1.) area and circumference of a circle of a circle with radius 4 in.

Question

1.) area and circumference of a circle of a circle with radius 4 in.

 

Answer 1

Area of a circle:  A = (pi)r²

A = (pi)4² = 16(pi) in²

 

Circumference of a circle:  c = 2(pi)r

c = 2(pi)4 = 8(pi) in.

 

These are just plug ins to the formula.