Question

find the area of a circle with a diameter of 4. either enter an exact answer in terms of π or use 3.14 for π and enter your answer as a decimal. units²

Explanation:

Step1: Calculate radius from diameter

The radius $r$ is half the diameter.
$r = \frac{4}{2} = 2$

Step2: Apply circle area formula

Use the area formula $A = \pi r^2$.
Exact answer: $A = \pi (2)^2 = 4\pi$
Decimal approximation: $A = 3.14 \times (2)^2 = 3.14 \times 4 = 12.56$

Answer:

Exact answer: $4\pi$ units$^2$
Decimal answer: $12.56$ units$^2$