calculate the Area of a circle with radius 2cm
Use the standard formula:
A=π*r^2
http://www.mathsisfun.com/geometry/circle-area.html
12.571
To calculate the area of a circle, you use the formula A = π * r^2, where A represents the area and r is the radius of the circle.
Given that the radius is 2 cm:
1. Substitute the value of the radius into the formula:
A = π * (2 cm)^2
2. Simplify the equation by squaring the radius:
A = π * 4 cm^2
3. Calculate the value of π, which is approximately 3.14159:
A ≈ 3.14159 * 4 cm^2
4. Multiply the two values to find the area:
A ≈ 12.56636 cm^2
Therefore, the area of a circle with a radius of 2 cm is approximately 12.56636 cm^2.
To calculate the area of a circle, you can use the formula: A = πr^2, where A is the area and r is the radius. In this case, the radius is 2cm.
Step 1: Substitute the value of the radius into the formula.
A = π(2cm)^2
Step 2: Simplify the equation by squaring the radius.
A = π * 4cm^2
Step 3: Multiply π (approximated as 3.14159) by the squared radius.
A ≈ 3.14159 * 4cm^2
A ≈ 12.56636 cm^2
So, the area of a circle with a radius of 2cm is approximately 12.56636 cm^2.