Find the circumference of a circle whose diameter is 2xR=4.2 ft. Use Pi = 3.14, and round the result to the nearest tenth.
would this be
3.14 x 2 x 4.2ft?
yes
To find the circumference of a circle, you need to use the formula:
C = πd
where C is the circumference, π (Pi) is a mathematical constant approximately equal to 3.14, and d is the diameter of the circle.
In this case, the diameter is given as 2 times the radius (2xR). The diameter given is 4.2 ft, so we can write:
d = 4.2 ft
To find the circumference, we substitute the value of the diameter into the formula:
C = πd
C = 3.14 * 4.2 ft
C ≈ 13.188 ft
To round the result to the nearest tenth, we look at the digit in the second decimal place. In this case, the digit is 8. Since it is greater than or equal to 5, we can round up the previous digit:
C ≈ 13.2 ft
Therefore, the circumference of the circle is approximately 13.2 ft.