How to Calculate the Area of a Circle
What is the formula to calculate the area of a circle?
A. A = πr2
B. A = 2πr
C. A = 1/2πr
D. A = πr
Answer:
The correct formula to calculate the area of a circle is A = πr2.
Calculating the area of a circle is a fundamental concept in geometry. The area of a circle is defined as the amount of space inside the boundary of the circle. To find the area of a circle, you need to know the radius of the circle, which is the distance from the center of the circle to any point on its circumference.
The formula to calculate the area of a circle is A = πr2, where A is the area and r is the radius of the circle. The value of π is approximately 3.14159, a mathematical constant that represents the ratio of the circumference of a circle to its diameter.
To use this formula, simply square the radius of the circle and multiply it by π. For example, if the radius of a circle is 5 units, the area of the circle would be A = π(52) = 25π square units.
Remember to always use the correct formula (A = πr2) when calculating the area of a circle to ensure accurate results.