Answer:
A = 78.54
C = 31.42
Explanation:
Remember this rhyme, to help you save time!
*Pi - R - Squared sounds like Area to me and when I need to find Circumference I just use Pi D*
Area = πr²
Circumference = πd
Now let's solve it!
Area = π × 5²
Area = 25π
(type into the calculator)
Area = 78.54
Circumference = πD
Remember D is the diameter and the diameter is double the radius!
The radius is 5 and when we double it, it becomes 10!
Let's use 10 in our equation to solve
Circumference = π × 10
(type into the calculator)
Circumference = 31.42