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

Question

Use 3.14 for pi.

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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:

\[ A = \pi r^2 \]

Where \( \pi \) is approximately 3.14.

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

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

3. For \( d = 2 \) in, we first need to find the radius \( r \): \[ r = \frac{d}{2} = \frac{2}{2} = 1 \text{ in} \] Now calculate the area: \[ A = 3.14 \times (1)^2 = 3.14 \times 1 = 3.14 \text{ in}^2 \]

Summary of Areas:

• For \( r = 4 \) in: 50.24 in²
• For \( r = 2 \) in: 12.56 in²
• For \( d = 2 \) in: 3.14 in²