Parallel Prisms Small 320×78 Medium 640×155 Large 1024×249 Download Tiff Original 2400×583 | (167.3 KB) Description Showing different types of parallel prisms: rectangular, right triangular, acute triangular, and obtuse triangular. Keywords acute triangular, geometry, obtuse triangular prism, parallel prisms, rectangular prism, right triangular Galleries Prisms Source: Ellsworth D. Foster ed. The American Educator (vol. 3) (Chicago, IL: Ralph Durham Company, 1921)
