Answer:
7. c = 2×pi×r
c = 2x3.14x28√ 3
c = 2x3.14x48.5
c = 304.58cm
8. c = 2×pi×r
c = 2x3.14x10
c = 62.8cm
9. c = 2×pi×r
c = 2x3.14x18cm
c = 113.04cm
10. c = 2×pi×r
c = 2x3.14x8cm
c = 50.24cm
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Answer:
7. c = 2×pi×r
c = 2x3.14x28√ 3
c = 2x3.14x48.5
c = 304.58cm
8. c = 2×pi×r
c = 2x3.14x10
c = 62.8cm
9. c = 2×pi×r
c = 2x3.14x18cm
c = 113.04cm
10. c = 2×pi×r
c = 2x3.14x8cm
c = 50.24cm