Question

In which of the following circles are the values of the area and circumference the same? Approximate Π as 3.14.

a circle with a radius of 2 feet
a circle with a diameter of 2 feet
a circle with a radius of 4 feet
a circle with a diameter of 1 foot

Answer 1

We know that:

$A = \pi r^2$

and

$C=2\pi r$

so:

$A=C\\\\\pi r^2=2\pi r\qquad|:\pi\\\\r^2=2r\qquad|:r\\\\\boxed{r=2}$

It is true when radius = 2 units, so correct answer is:

A) a circle with a radius of 2 feet.

Answer 2

Answer:

Circle with a radius of 2 feet

Step-by-step explanation: