posted by gracie on .
the radius is 6.what is the area and circumference?
Formula for area of a circle is πr^2
Formula for circumference is 2πr or πD where D is diameter which is double the radius.
Now, try do the math...I will be glad to check your work.
area = pi r^2
circumference = 2 pi r
pi is about 3.14159
Area = pi * r^2
A = 3.14 * 36
A = ?
C = pi * d
C = 3.14 * 12
C = ?
Let me give a similar example...the radius of a circle is 5cm. What is the area and circumference.
Area = πr^2 = π5^2 = 25π.
Circumference = 2 x π x 5 = 10π
The value for π is 3.142 but since this is a 5th grade math sum, i doubt they'll want you to calculate using the value of π.
Now, try the sum u were given and see if you get the correct answer. I will be glad to help you through.