Calculate the circumference.
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Calculate the circumference.
To solve this problem, we will follow these steps:
Now, let's work through each step:
Step 1: We are given the radius .
Step 2: The formula for the circumference is . Substituting the value of , we get:
.
Step 3: Calculate the expression:
.
.
Therefore, the circumference of the circle is approximately .
Hence, the solution to the problem is 182.212.
182.212
\( r=11 \)
Calculate the circumference.
The circumference formula C = 2πr comes from the relationship between radius and diameter. Since diameter = 2 × radius, and C = πd, we get C = π(2r) = 2πr.
Use π ≈ 3.14159 for most problems unless told otherwise. Some problems may ask you to leave π as a symbol or use 3.14 for simpler calculations.
The circumference should be about 6 times the radius (since 2π ≈ 6.28). For radius 29, expect around 6 × 29 = 174, so 182.212 makes sense!
Yes! The exact answer is . Use decimals only when the problem asks for a numerical approximation.
Remember: circumference is the distance around the circle. Think of it as the perimeter of a circle. The formula C = 2πr connects this distance to the radius.
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