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Visionscaper · Answer 1 · 2019-03-06T16:57:31+0000

The circle-shaped part of the necklace pendant above has a diameter of 3 mm.
so its circumference = pi * diameter = 3pi

The circumference of the circle-shaped part of each of the earrings is one-half the circumference of the circle-shaped part of the necklace pendant.

So the circumference of the circle-shaped part of one of the earrings = 3pi/2 = 1.5pi = 4.71mm

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