Calculate the circumference for the following radii and diameters. Use the formula for circumference, \( C = 2\pi r \) for radii, and \( C = \pi d \) for diameters.

1. \( r = 9 \, \text{ft} \)
2. \( r = 21 \, \text{m} \)
3. \( d = 30 \, \text{cm} \)
4. \( d = 24 \, \text{cm} \)
5. \( r = 15.2 \, \text{in} \)
6. \( r = 16.01 \, \text{ft} \)

Please provide only the answers, for example, the circumference for \( r = 9 \, \text{ft} \) is 56.52 ft.

r − a r a d i u s o f t h e c i rc l e d − a d iam e t er o f t h e c i rc l e a c i rc u m f ere n ce o f t h e c i rc l e : 2 π r = d π r = 9 f t → 2 π r = 2 π ⋅ 9 = 18 π ≈ 18 ⋅ 3.14 = 56.52 ( in ) r = 21 m → 2 π r = 2 π ⋅ 21 = 42 π ≈ 42 ⋅ 3.14 = 131.88 ( m ) d = 30 c m → d π = 30 π ≈ 30 ⋅ 3.14 = 94.2 ( c m ) d = 24 c m → d π = 24 π ≈ 24 ⋅ 3.14 = 75.36 ( c m ) r = 15.2 in → 2 \pir = 2 π ⋅ 15.2 = 30.4 π ≈ 30.4 ⋅ 3.14 = 95.456 ( in ) r = 16.01 f t → 2 π r = 2 π ⋅ 16.01 = 32.02 π ≈ 32.02 ⋅ 3.14 = 100.5428 ( f t )

Answered by Anonymous | 2024-06-10

The circumferences for the given radii and diameters have been calculated using the formulas for circumference. The results include approximately 56.52 ft for 9 ft radius and 100.54 ft for 16.01 ft radius, among others. Each measurement shows the relationship between radius or diameter and circumference accurately.
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Answered by Anonymous | 2024-12-23