Asked by Elizabeth

Find the area of the circle described. Use pi= 22/7.

Diameter= 1.4cm

Please help!
Answered by Ms. Sue
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


Answered by shr=er
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
Answered by PsyDAG
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.

Answered by hello
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(:
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