

The equation for finding the circumference of a circle:
If the radius of this circle is 1, then that means the diameter is 2. We multiply 2 by π to get our answer: 2π or approximately 6.283.
A.
If you roll up the quarter circle and cap the open end with the smaller circle, the resulting shape should be a cone.
A quadrilateral because you just reverse the question.
Answer:
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