Which angle is a vertical angle with zefd? o zdfb ozced zbfc ozafb

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.

Is this a polynomial function? i need to know asap