This rectangular prism is cut by the plane shown. The plane is perpendicular to the base of the rectangular prism. What is the shape of the cross-section?

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.

With alll of except for the 2 that i did already

What is the area of the shaded sector?