Quarter-Circular Cross Sections: This term refers to finding the volume of a solid by using quarter-circles (90 degrees) as the base for each cross section.
Elliptical Cross Sections: This term refers to finding the volume of a solid by using ellipses (oval shapes) as the base for each cross section.
Parabolic Cross Sections: This term refers to finding the volume of a solid by using parabolas (U-shaped curves) as the base for each cross section.