Question

The lid of a water bottle is a circle with a radius of o.5 inch find a the circumference of the lid and b the area of the lid use 3.14

Answer 1

a.

The circunference of a circle is given as:

$C=2\pi r$

plugging the values we have:

$C=2(3.14)(0.5)=3.14$

therefore the circumference of the lid is 3.14 in.

b.

The area of a circle is given as:

$A=\pi r^2$

then:

$A=3.14(0.5)^2=0.785$

therefore the area of the lid is 0.785 squared inches.