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yufr:
A circle that originally had a circumference of 31.4 cm, now has a circumference of 15.7 cm. What happened to the radius?
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jhonyy9:
do you know formula of circumference of a circle ?
Vocaloid:
old question, will respond so this can be closed the circumference was halved from 31.4cm to 15.7cm. since the circumference is proportional to the radius, then the radius must have been halved as well.
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