Find the area of a circle if its radius is 4.2 cm.
| January 6, 2021 | education
We start solving the problem by writing the formula for the area of a circle:
S = n * r ^ 2
we are told that pi should be rounded to tenths:
n = 3.14 = 3.4.
Now we have all the data for determining the area of a given circle:
S = 3.1 * 4.2 ^ 2 = 3.1 * 17.64 = 54.684 cm2.
Answer: The area of a given circle is 54.684 cm2.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
