Find the radius of a circle circumscribed about a square with a perimeter of 16 cm.

univerkov | November 29, 2020 | education

1) all sides of the square are equal, so 16/4 = 4 = one side a.
2) the square has only 4 sides.
3) R = a / √2 = 4√2 / 2 = 2√2.
Answer: 2√2.

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