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Find the area of a circle with a diameter of 4.
Either enter an exact answer in terms of
pi or use 3.14 for
pi and enter your answer as a decimal.
units
^(2)

Find the area of a circle with a diameter of $4$ . $\newline$ Either enter an exact answer in terms of $\pi$ or use $3$ . $14$ for $\pi$ and enter your answer as a decimal. $\newline$ $\square$ units $^{2}$

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Negative Exponents

Full solution

Q. Find the area of a circle with a diameter of

4

.

\newline

Either enter an exact answer in terms of

\pi

or use

3

.

14

for

\pi

and enter your answer as a decimal.

\newline

\square

units

^{2}

Circle Area Formula: The formula for the area of a circle is $A = \pi r^2$ , where $r$ is the radius.
Calculate Radius: Since the diameter is $4$ units, the radius is half of that, so $r = 4 / 2 = 2$ units.
Plug in Radius: Now plug the radius into the area formula: $A = \pi \times (2)^2$ .
Calculate Area: Calculate the area: $A = \pi \times 4$ .
Use Pi Value: If we use $3.14$ for $\pi$ , then $A = 3.14 \times 4$ .
Final Area Calculation: Do the multiplication: $A = 12.56 \, \text{units}^2$ .

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