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The problem asks to find the circumference and area of a circle with a diameter of 4 yards. You are to use \( \pi = 3.14 \).

### 1. **Circumference**:
The formula for the circumference \( C \) of a circle is:
\[
C = \pi \times d
\]
where \( d \) is the diameter.

For this circle:
\[
C = 3.14 \times 4 = 12.56 \text{ yards}
\]

### 2. **Area**:
The formula for the area \( A \) of a circle is:
\[
A = \pi \times r^2
\]
where \( r \) is the radius, which is half the diameter. Here, the radius \( r = \frac{4}{2} = 2 \) yards.

Thus, the area is:
\[
A = 3.14 \times 2^2 = 3.14 \times 4 = 12.56 \text{ square yards}
\]

### Answers:
- **Circumference**: \( 12.56 \, \text{yd} \)
- **Area**: \( 12.56 \, \text{yd}^2 \)

Would you like further details or have any questions?

### Related Questions:
1. What would be the circumference if the diameter were doubled?
2. How does the area change when the radius is doubled?
3. What is the formula for the volume of a sphere, and how does it relate to a circle?
4. How can you express the area in terms of diameter instead of radius?
5. How would the results change if you used the exact value of \( \pi \) instead of \( 3.14 \)?

### Tip:
Always ensure that the units in your final answer match the quantity being asked—length for circumference and square units for area.

Find the circumference and the area of a circle with a diameter of 4 yards. Use 3.14 for π.

Find the circumference and area of a circle with a diameter of 4 yards. Using π = 3.14, solve for the circumference and area, where the diameter is 4 yards and the radius is 2 yards. This problem is suitable for students in Grades 6-8.

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