Find the circumference of each circle. Use [3.14] for the value of [pi]. Round your answer to the nearest hundredth if d = 22 cm.
Understand the Problem
The question is asking to calculate the circumference of a circle given its diameter. The circumference can be calculated using the formula C = πd, where π is approximated as 3.14. The answer should be rounded to the nearest hundredth.
Answer
The circumference is \( 69.08 \text{ cm} \).
Answer for screen readers
The circumference is ( 69.08 \text{ cm} ).
Steps to Solve
- Identify the formula to use
The formula for the circumference ( C ) of a circle is given by: $$ C = \pi \cdot d $$
- Substitute the diameter into the formula
In this case, the diameter ( d ) is 22 cm. Substitute this value into the formula: $$ C = 3.14 \cdot 22 $$
- Calculate the circumference
Now, perform the multiplication: $$ C = 3.14 \cdot 22 = 69.08 \text{ cm} $$
- Round to the nearest hundredth
Since the calculation yields an exact value of 69.08, rounding is not necessary in this case as it’s already in that format.
The circumference is ( 69.08 \text{ cm} ).
More Information
The circumference of a circle gives the distance around the circle. Using ( \pi ) as 3.14 is a common approximation, useful for simpler calculations.
Tips
- Neglecting to multiply correctly: Double-check multiplication steps to ensure accuracy.
- Forgetting to use the correct value of ( \pi ): Always ensure you use the specified value, in this case, 3.14.
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