Solve these problems.
A. C = 2*2*3.14
B. A = 3.14*2*3.14*2
C. C = 3.14*2*3960
We'll be glad to check your answers.
A. What is the circumference of a circle with a radius of 2 m?
B.What is the area of a circle with a radius of 2 m?
C. The earth has a radius of about 3960 miles. Approximately how long is the equator?
A. C = 2*2*3.14
B. A = 3.14*2*3.14*2
C. C = 3.14*2*3960
We'll be glad to check your answers.
B. A = 18.84. 28?
C. C = 24868.8?
B. I mistyped the formula above. It should be:
A = 3.14*2*2
C. You're right! :-)
B. A= 12.56
C. Alright!
A. What is the circumference of a circle with a radius of 2 m?
To find the circumference, we will use the formula 2πr where π is a constant.
Substituting the given values, we get:
Circumference = 2 * 3.14 * 2 m = 12.56 m
Therefore, the circumference of a circle with a radius of 2 m is 12.56 m.
B. What is the area of a circle with a radius of 2 m?
To find the area, we will use the formula πr².
Substituting the given values, we get:
Area = 3.14 * (2 m)² = 12.56 m²
Therefore, the area of a circle with a radius of 2 m is 12.56 square meters.
C. The earth has a radius of about 3960 miles. Approximately how long is the equator?
To find the length of the equator, we will use the formula for the circumference of a circle.
Substituting the given radius value, we get:
Circumference = 2 * 3.14 * 3960 miles ≈ 24,879.84 miles
Therefore, approximately, the length of the equator is 24,879.84 miles.
Note: In questions involving π, use of π as a constant is often approximated as 3.14. However, it is important to remember that π is an irrational number and its decimal representation is infinite.