Find the area of a circle if its radius is 4.2 cm.
| January 13, 2021 | education
The formula for calculating the area of a circle is:
S = π * r ^ 2;
π = 3.1 (according to the condition, rounded up to tenths).
r = 4.2 cm;
Substitute the values into the formula and calculate:
S = 3, 1 * 4, 2 * 4, 2 = 54, 684 cm ^ 2.
Answer: the area of the circle is 54.684 cm ^ 2.
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.
