Prismått

Prismått refers to the measurements that define a prism, a solid in geometry composed of two parallel congruent bases connected by rectangular side faces. The term encompasses the size and shape of the prism, including the dimensions of the base and the height (the distance between the bases). In a prism with a rectangular base, commonly called a rectangular prism or box, the dimensions are length, width, and height (l, w, h). For a triangular prism, the base is a triangle with sides a, b, c and height h.

Calculations: Volume is the product of base area B and height h: V = B × h. For a rectangular prism, V = l × w × h and B = l × w, so V = lwh. Surface area is the sum of the areas of all faces: SA = 2B + P × h, where P is the perimeter of the base. For a rectangular prism, SA = 2(lw + lh + wh). When the base is a polygon with n sides, B is the area of the base polygon and P is its perimeter; SA = 2B + P × h.

Measurement methods: prismått can be determined with standard measuring tools such as rulers or calipers for edge lengths, tape measures for larger objects, and geometric calculations from base measurements and height. In practice, exact prismått are essential in manufacturing, packaging, architecture, and optics where precise volume and material estimates are required.

See also: Prism (geometry), Polyhedron, Volume, Surface area.