If the diameter of a circle is 22 cm, what is the circumference of the circle and the area of the circle
Here are some equations that might help you
circumference = diameter * pi
diameter = 2 * radius
area = 2 * radius * pi
pi = 3.14159264......
To find the circumference of a circle, you use the formula:
Circumference = π × Diameter
Where π (pi) is a mathematical constant and approximately equal to 3.14159.
In this case, the diameter of the circle is given as 22 cm.
So to find the circumference, you can substitute the value of the diameter into the formula:
Circumference = π × 22 cm
To calculate the circumference, you can use a calculator or a computer program that has the value of π stored in it. Multiply 3.14159 by 22:
Circumference ≈ 3.14159 × 22 ≈ 69.08 cm (approximately)
Therefore, the circumference of the circle is approximately 69.08 cm.
To find the area of the circle, you use the formula:
Area = π × (Diameter/2)^2
In this case, the diameter of the circle is 22 cm.
So to find the area, you can substitute the value of the diameter into the formula:
Area = π × (22 cm/2)^2
To calculate the area, you can use a calculator or a computer program that has the value of π stored in it. Divide 22 by 2 to get the radius (which is half the diameter):
Area ≈ 3.14159 × (11 cm)^2 ≈ 3.14159 × 121 cm^2
Calculate the square of 11 (11^2 = 121) and multiply it by π:
Area ≈ 3.14159 × 121 cm^2 ≈ 380.132 cm^2 (approximately)
Therefore, the area of the circle is approximately 380.132 cm^2.