A 3 by 4 rectangle is inscribed in circle. What is the circumference of the circle?

2.5π
3π
5π
4π

Correct Answer: 5π

Explanation:

Draw the diagram. The diagonal of the rectangle is the diameter of the circle. The diagonal is the hypotenuse of a 3,4,5 triangle and is therefore, 5.

Circumference = π.diameter = 5π

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