10-05-2017
Mathematics

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10-05-2017

1.B

15x3.14= 47.1

2. 3.2

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10-05-2017

Circumference formula: 2πr
Diameter: 2r
1: 15×3.14= 47.1 in
2. AB is radius so use circumference formula to solve for r
20=2πr
20=6.28r
R=3.18 cm or 3.2 cm

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