A. Directions: Estimate the circumference = 3 × diameter Number 1 is done for you.
1. D = 12 m
C = 3×12m
= 36m
2. D = 7.5 cm
3. D = 8 cm
4. D = 3.2 m
5. D = 38 cm
6. D = 18 cm
1. D = 12 m
C = 3×12m
= 36m
2. D = 7.5 cm
3. D = 8 cm
4. D = 3.2 m
5. D = 38 cm
6. D = 18 cm
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Answer:
2. Circumference of a cicle in terms of radius:
Circumference = 2·π·r = 2·3.14·3.75 = 23.56(*)
In terms of diameter:
Circumference = π·d = 3.14·7.5 = 23.55(*)
In terms of area:
Circumference C = √4·π·A = √4·π·44.18 = 23.56(*)
3. Circumference of a cicle in terms of radius:
Circumference = 2·π·r = 2·3.14·4 = 25.14(*)
In terms of diameter:
Circumference = π·d = 3.14·8 = 25.12(*)
In terms of area:
Circumference C = √4·π·A = √4·π·50.27 = 25.14(*)
4. Circumference of a cicle in terms of radius:
Circumference = 2·π·r = 2·3.14·1.6 = 10.05(*)
In terms of diameter:
Circumference = π·d = 3.14·3.2 = 10.05(*)
In terms of area:
Circumference C = √4·π·A = √4·π·8.04 = 10.05(*)
5.Circumference of a cicle in terms of radius:
Circumference = 2·π·r = 2·3.14·19 = 119.37(*)
In terms of diameter:
Circumference = π·d = 3.14·38 = 119.32(*)
In terms of area:
Circumference C = √4·π·A = √4·π·1134 = 119.37(*)
6. Circumference of a cicle in terms of radius:
Circumference = 2·π·r = 2·3.14·9 = 56.56(*)
In terms of diameter:
Circumference = π·d = 3.14·18 = 56.52(*)
In terms of area:
Circumference C = √4·π·A = √4·π·254.5 = 56.56(*)