Answer:
a. area = 78.5
circumference = 31.4
b. area = 113.04
circumference = 37.68
Explanation:
To find the area use:
Area = pi • r^2
They said to use 3.14 for pi.
Area = 3.14r^2
For part a, the diameter is given, 10. Radius is half of diameter. Radius is 5.
Area = 3.14•5^2
= 3.14•25
= 78.5
Same formula for area for part b. But the radius is given, 6.
area = 3.14•6^2
= 3.14 • 36
= 113.04
Circumference is
C = pi•d
part a the diameter is 10.
C = pi • 10
= 3.14 • 10
= 31.4
for part b, double the radius to find the diameter. Radius is 6, so diameter is 12.
C = pi • d
= 3.14 • 12
= 37.68