Find the circumference and the area of a circle with diameter
5cm
.
Use the value
3.14
for
π
, and do not round your answers. Be sure to include the correct units in your answers.
C = πd
A = πr^2 = π/4 d^2
just plug in your numbers
To find the circumference of a circle, you can use the formula:
Circumference = π * diameter.
Given that the diameter is 5 cm, we can substitute this value into the formula:
Circumference = 3.14 * 5 cm
Circumference = 15.7 cm (rounded to one decimal place)
Therefore, the circumference of the circle is 15.7 cm.
To find the area of a circle, you can use the formula:
Area = π * (radius)^2.
The radius is half the diameter, so we can calculate it as follows:
Radius = diameter / 2
Radius = 5 cm / 2
Radius = 2.5 cm
Now we can substitute this value into the formula:
Area = 3.14 * (2.5 cm)^2
Area = 3.14 * 6.25 cm^2
Area = 19.625 cm^2 (rounded to three decimal places)
Therefore, the area of the circle is 19.625 cm^2.
To find the circumference of a circle, you can use the formula:
Circumference = π x Diameter
Given that the diameter is 5cm and π is 3.14, we can substitute these values into the formula:
Circumference = 3.14 x 5 cm
Circumference = 15.7 cm
Therefore, the circumference of the circle is 15.7 cm.
To find the area of a circle, you can use the formula:
Area = π x (Radius)^2
Given that the diameter is 5cm, we can find the radius by dividing the diameter by 2:
Radius = Diameter / 2
Radius = 5 cm / 2
Radius = 2.5 cm
Substituting the values of π and the radius into the formula, we have:
Area = 3.14 x (2.5 cm)^2
Area = 3.14 x 6.25 cm^2
Area = 19.625 cm^2
Therefore, the area of the circle is 19.625 cm^2.