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What size button hole is needed for a button with a circumference of 7.38 centimeters use the value of 3.14 to represent pi?
Wiki User
∙ 11y ago
A buttonhole will need to be as wide as the widest part of the button, if the button is to be able to pass through it. A button is a circle shape; the widest part of a circle is its diameter.
The formula to find the circumference of a circle is Pi multiplied by the diameter of a circle.
We already know the circumference of the button, and we know the value of Pi, so we can rearrange the above formula:
3.14 x diameter = 7.38 ---> 7.38 / 3.14 = diameter
So, the diameter of the button is 2.35 cm. The buttonhole will therefore need to be this size. Actually, probably a tiny bit bigger unless you want it to be extremely tight!
Wiki User
∙ 11y ago
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