SSC MCQ Question Ans. Solid Geometry

SSC MCQ Question Ans. Solid Geometry. Solids of different shapes are always needed and used in our practical life. Among these, there are regular and irregular solids. The method of determining volumes and areas of surfaces of regular solids and compound solids constructed of two regular solids will be discussed in this chapter.

Plane surface: If the straight line joining any two points on a surface lies wholly on that surface, then the surface is called a plane surface or simply a plane. The upper surface of the still water of a pond is a plane. The smooth floor of a room polished with cement or mosaic is considered to be a plane. But geometrically it is not a plane, for there are high and low points on the floor.

SSC MCQ Question Ans. Solid Geometry

A prism is a polyhedron, bounded by two parallel polygonal faces and the other faces always being parallelograms. The parallel sides are known as bases and the sides are known as lateral faces. If all the lateral surfaces are rectangular it is called a right prism;  otherwise, they are called obliques prism.  Practically right prisms are frequently used. The prism is named after the shape of its base. For example, triangular prism, quadrilateral prism, pentagonal prism, etc.

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