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The diameter of a circle is 22 miles. What is the circle’s area? Use 3.14 for pi.. Single choice. 1,519.76 miles sq.
Question
The diameter of a circle is 22 miles. What is the circle’s area? Use 3.14 for pi.. Single choice.
1,519.76 miles sq.
379.94 miles sq.
69.08 miles sq.
1,520 miles sq.
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Mathematics
3 years
2021-08-06T19:05:31+00:00
2021-08-06T19:05:31+00:00 1 Answers
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Answer:
379.94 mi²
Step-by-step explanation:
The area of a circle can be figured out with this formula: πr² (3.14 is π here, as it says in the directions).
We know the diameter is 22 miles. Divide that by 2 to get a radius of 11 miles.
The equation now becomes
3.14(11²)
11 squared is 121.
3.14(121)
I recommend splitting the 121 into 100, 20, and 1.
(3.14 * 100) + (3.14 * 20) + (3.14 * 1)
Multiply 3.14 by 100, 20, and 1.
314 + 62.8 + 3.14
Add 314 and 62.8.
376.8 + 3.14
Add 376.8 and 3.14
379.94 mi² is the area of a circle with a 22-mile diameter.