Aright rectangular prism has base dimensions of 3 inches by 12 inches and a height of 5 inches. an oblique rectangular prism has base dimensions of 4 inches by 9 inches and a height of 5 inches. are the volumes the same? . a.. yes, because the heights are equal and the cross-sectional areas at every level parallel to the bases are also equal.. b.. yes, because the figures are congruent.. c.. no, because the cross-sectional areas are not the same.. d.. no, because only the bases have the same area, not every cross section at every level parallel to the bases..