Answer:
1.
R: 13
D: 26
C: 2πr = 2(3.14)(13) = 81.64
2.
R: 2
D: 4
C: 2πr = 2(3.14)(2) = 12.56
3.
R: 4
D: 8
C: 2πr = 2(3.14)(4) = 25.12
4.
R: 10
D: 20
C: 2πr = 2(3.14)(10) = 62.8
5.
R: 8
D: 16
C: 2πr = 2(3.14)(8) = 50.24
Explanation:
Radius is equal to the half of the diameter.
Diameter is twice the Radius.
Circumference is equal to 2πr
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