A prism is a polyhedron that is limited by two equal polygons called bases and parallelograms called lateral faces.

The height of the prism is the distance between the planes that contain the bases.

If all the lateral faces are rectangles we call it right prism and if they aren’t we call it oblique prism.

If the bases are triangles, squares, rectangles, pentagons, we call it triangular prism, square prism, rectangular prism (cuboid), pentagonal prism,…

Development of a right prism and its area


The area of a prism is the addition of all the areas of its faces.
1.- Calculate the total area of a prism whose base is a rhombus with diagonals of 12 and 18 cm.
2.- Calculate the total area of a triangular prism whose base is a equilateral triangle of side 10 m and whose height is 20 m
Solutions: 1) 1254.72 cm2; 2) 687 m2


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