Find the area of the circle described. Use pi= 22/7.
Diameter= 1.4cm
Please help!
Area = pi * r^2
Radius = 0.7 or 7/10
A = 22/7 * 49/100
A = 1078/700
A = 1 54/100 = 1 27/50 square centimeters
the circumference of a circle and the perimeter of a square are both 40 cm. which has a greater are.the circle or the square?find the circumference
First, if you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.
Second, you have already stated the circumference of the circle.
If the perimeter of a square = 40 cm, each side must 10 cm, giving you an area 10*10 = 100 cm.
Circle circumference = π d = 40, where d = diameter
Therefore d = 40/π
Circle area = 1/4 π d^2 = 1/4 π (40/π)^2
Insert d value from first equation into the second, solve for area and compare to square area.
if its the diamater you just cut that in half to make the radius then you do that times pie which is 3.14 or 22/7. you welcome(:
To find the area of a circle, you can use the formula:
Area = π * r^2
where π (pi) is approximately equal to 22/7, and r is the radius of the circle.
In this case, you are given the diameter of the circle, which is 1.4 cm. The radius of a circle is half of the diameter, so you can find the radius using the formula:
Radius = Diameter / 2
Substituting the given diameter value, you can calculate the radius:
Radius = 1.4 cm / 2 = 0.7 cm
Now that you have the radius, you can calculate the area using the formula:
Area = π * (radius)^2
Substituting the values into the formula:
Area = (22/7) * (0.7 cm)^2
Calculating:
Area = (22/7) * (0.7 cm * 0.7 cm)
Area = (22/7) * (0.49 cm^2)
Area = 1.54 cm^2 (rounded to two decimal places)
Thus, the area of the circle described is approximately 1.54 square centimeters.