Which coin has a width of 21 mm?

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Multiple Choice

Which coin has a width of 21 mm?

Explanation:
Width here means the coin’s diameter—the distance across the circle. When you compare standard U.S. coin sizes, the nickel has a diameter of about 21.21 millimeters. A width of 21 millimeters is a close match to that, since dimes are about 17.9 mm, pennies about 19.0 mm, and quarters about 24.3 mm. So the coin with a width near 21 mm is the nickel.

Width here means the coin’s diameter—the distance across the circle. When you compare standard U.S. coin sizes, the nickel has a diameter of about 21.21 millimeters. A width of 21 millimeters is a close match to that, since dimes are about 17.9 mm, pennies about 19.0 mm, and quarters about 24.3 mm. So the coin with a width near 21 mm is the nickel.

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