X

Available for CBSE, ICSE and State Board syllabus.

Call our LearnNext Expert on 1800 419 1234 (tollfree)

OR submit details below for a call back

Summary

Videos

References

Objects with fixed shape, size, and occupying fixed space are called solids. Solid figures have three dimensions - length, breadth and height.

e.g. A ball, a brick, an ice cream cone and a can.

**Face**

The flat surface of a solid shape is called a face.

**Edge**

Any two adjacent faces of a solid shape meet on a line segment called an edge.

**Vertex**

A vertex of a solid shape is a point where three or more edges meet.

A solid bounded by six rectangular faces is called a **cuboid**. A cuboid has 6 faces, 12 edges and 8 vertices.

A solid bounded by six square faces is called a **cube. **

A solid whose bases are parallel plane polygons and the lateral faces are rectangles is called a **prism. **A **pyramid **is a solid whose base is a plane rectilinear figure whose lateral faces are triangles with a common vertex, called the vertex of the pyramid**. **Prisms and pyramids are named after their bases. The base of a prism can be of any polygonal shape such as triangle and square.

A prism with two congruent triangles as bases which are parallel to each other and three lateral rectangular faces is a Triangular prism. There are 5 faces, 9 edges and 6 vertices in a triangular prism.

There are 4 faces, 6 edges and 4 vertices in a triangular pyramid.

A cylinder has two circular plane surfaces at its base and top. It has a curved surface in the middle. A cylinder has 2 flat faces, 1 curved surface and 2 edges. There are no vertices in a cylinder.

A cone has 1 flat face and 1 curved surface. There are 1 edge and 1 vertex.

The ball-like shape is called a sphere. A sphere has one curved surface, no edge and no vertex.

Objects with fixed shape, size, and occupying fixed space are called solids. Solid figures have three dimensions - length, breadth and height.

e.g. A ball, a brick, an ice cream cone and a can.

**Face**

The flat surface of a solid shape is called a face.

**Edge**

Any two adjacent faces of a solid shape meet on a line segment called an edge.

**Vertex**

A vertex of a solid shape is a point where three or more edges meet.

A solid bounded by six rectangular faces is called a **cuboid**. A cuboid has 6 faces, 12 edges and 8 vertices.

A solid bounded by six square faces is called a **cube. **

A solid whose bases are parallel plane polygons and the lateral faces are rectangles is called a **prism. **A **pyramid **is a solid whose base is a plane rectilinear figure whose lateral faces are triangles with a common vertex, called the vertex of the pyramid**. **Prisms and pyramids are named after their bases. The base of a prism can be of any polygonal shape such as triangle and square.

A prism with two congruent triangles as bases which are parallel to each other and three lateral rectangular faces is a Triangular prism. There are 5 faces, 9 edges and 6 vertices in a triangular prism.

There are 4 faces, 6 edges and 4 vertices in a triangular pyramid.

A cylinder has two circular plane surfaces at its base and top. It has a curved surface in the middle. A cylinder has 2 flat faces, 1 curved surface and 2 edges. There are no vertices in a cylinder.

A cone has 1 flat face and 1 curved surface. There are 1 edge and 1 vertex.

The ball-like shape is called a sphere. A sphere has one curved surface, no edge and no vertex.