Find the length of the circle if its radius is 2.25 cm (2.23 cm).

| January 11, 2021 | education

1) We denote through the variable L the value of the desired circumference, through the variable R the value of the length of the radius of our circle, equal to 2.25 cm, and through the variable PI, rounded to tenths, the value of the number PI, equal to 3.1.
Let’s find the value of our circumference using the following formula.
L = 2 x PI x R.
L = 2 x 3.1 x 2.25.
L = 6.1 x 2.25.
L = 13.725 cm.
Thus, the required length of our circumference is 13.725 cm.
2) We denote through the variable L the value of the desired circumference, through the variable R the value of the length of the radius of our circle, equal to 2.23 cm, and through the variable PI, rounded to tenths, the value of the PI number, equal to 3.1.
Let’s find the value of our circumference using the following formula.
L = 2 x PI x R.
L = 2 x 3.1 x 2.23.
L = 6.1 x 2.23.
L = 13.603 cm.
Thus, the required length of our circumference is 13.603 cm.



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