To calculate the circumference and area of a circle given the radius, we use the following formulas:
-
Circumference (C):
\[ C = 2 \times \pi \times r \] -
Area (A):
\[ A = \pi \times r^2 \]
Given:
- Radius (r) = 279 inches
- \(\pi \) ≈ 3.14
Step 1: Calculate the Circumference
\[ C = 2 \times 3.14 \times 279 \] \[ C = 6.28 \times 279 \] \[ C ≈ 1757.92 \text{ inches} \]
Step 2: Calculate the Area
\[ A = 3.14 \times (279)^2 \] \[ A = 3.14 \times 77841 \] \[ A ≈ 244034.74 \text{ square inches} \]
Final Table
| Radius | Circumference | Area | |----------|---------------|--------------| | 279 in. | 1757.92 in. | 244034.74 in²|
Thus, the completed table is:
- Circumference: 1757.92 in.
- Area: 244034.74 in²