Find the area of each circle with the given radius or diameter.

Question

Use 3.14 for pi.

Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
r = 4 in
r = 2 in
d = 2 in

Answer 1

To find the area of each circle, we can use the formula for the area of a circle:

\[ \text{Area} = \pi r^2 \]

where \( r \) is the radius of the circle.

1. For \( r = 4 , \text{in} \): \[ \text{Area} = 3.14 \times (4)^2 = 3.14 \times 16 = 50.24 , \text{in}^2 \]

2. For \( r = 2 , \text{in} \): \[ \text{Area} = 3.14 \times (2)^2 = 3.14 \times 4 = 12.56 , \text{in}^2 \]

3. For \( d = 2 , \text{in} \) (first find the radius): \[ r = \frac{d}{2} = \frac{2}{2} = 1 , \text{in} \] \[ \text{Area} = 3.14 \times (1)^2 = 3.14 \times 1 = 3.14 , \text{in}^2 \]

Thus, the areas are:

• For \( r = 4 , \text{in} \): \( 50.24 , \text{in}^2 \)
• For \( r = 2 , \text{in} \): \( 12.56 , \text{in}^2 \)
• For \( d = 2 , \text{in} \): \( 3.14 , \text{in}^2 \)