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1. A jar lid has a diameter of 42 millimeters. What is the circumference of the lid?
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1. A jar lid has a diameter of 42 millimeters. What is the circumference of the lid?

User Ruslan Mushkaev
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8.3k points

2 Answers

4 votes
Circumference of a circle = 2πR & since R= 1/2 of Diameter, then R =21 mm

& the Circumference = 2π.(21) = 42π mm or 132 mm
User Jbatista
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8.4k points
3 votes
The circumference will be approximately 131.95mm. Hope this helps :)
User Chris Lieb
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8.4k points
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