PRISM (Gr. rrpiva, properly a thing sawn, Irpii"ety, to saw) , in geometry a solid enclosed by plane surfaces, two of which, termed the ends, are parallel, equal, similar and similarly situated polygons, and the faces connecting the ends are parallelograms, equal in number to the sides of the
, does not occur in Latin; cognate are the Lat. angere, to compress into a bend or to strangle, and the Gr. ayKOS, a bend; both connected with the Aryan root ank-, to
)
. If the faces be perpendicular to the ends the prism is a " right prism," and the faces are rectangles; otherwise the prism is " oblique." The
is the line joining the centres of the ends. It may be generated by moving a plane (corresponding to an end or base) parallel to itself. A prismoid differs from a prism in having for its ends two dissimilar parallel figures. For illustrations see CRYSTALLOGRAPHY, and for the mensuration see that
JCSM was founded in 1997 and exists to help the community and bring people into a life-changing and productive
relationship with
Jesus Christ. JCSM offers over 200,000 free web pages, including
its
weekly inspirational emails
that were sent continuously for over a decade.
Jesus Christ
Saves Ministries
P.O. Box 9297 San Diego, CA 92169 1-888-887-0417 or
Email