Three-dimensional figures are discussed here v the numbers or pictures in addition to the explanation.Solids: Objects having fixed shape and size, and also occupying fixed space are dubbed solids.

Solids take place in assorted geometrical shapes. These shapes are well-known three-dimensional figures. Part 3-D forms are namely cuboids, cubes, cylinders and also cones.

We will certainly discuss around some the the 3-dimensional figures having level faces, namely cubes, cuboids, prisms, pyramids and tetrahedrons.

### Faces, Vertices and Edges that a 3-dimensional Figure:

(i) Faces: every flat component of a solid is called its face. (ii) Vertices: Each edge where three encounters of a solid satisfy is dubbed its vertex. The many of vertex is vertices. (iii) Edges: The two encounters of a solid fulfill in a line, referred to as an edge.

Now, us shall discuss about the faces, vertices and edges of part 3-dimensional figures having level faces.

### I. Cuboid:

A heavy bounded by 6 rectangular plane faces is dubbed a cuboid.

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A box, a matchbox, a book, a brick, a tile, etc., room all in the form of a cuboid.

In the adjoining figure, ABCDEFGH is a cuboid. (i) faces of a Cuboid: A cuboid has 6 faces.

In the given figure, the 6 deals with of the cuboid are:

ABCD, EFGH, ADHE, BCGF, ABFE and DCGH.

(ii) Vertices that a Cuboid: A cuboid has 8 vertices.

In the given figure, the 8 vertices the the cuboid are:

A, B, C, D, E, F, G, H.

(iii) edges of a Cuboid: A cuboid has actually 12 edges.

In the given figure, the 12 edges of the cuboid are:

AB, BC, CD, DA, EF, FG, GH, HE, AE, DH, BF, CG.

### II. Cube:

A cuboid who length, breadth and height room equal is called a cube. Dice, street cubes, ice cubes, etc., room all examples of a cube.

In the adjoining figure, ABCDEFGH is a cube. (i) encounters of a Cube: A cube has 6 faces.

In the offered figure, the 6 encounters of the cube are:

ABCD, EFGH, ADHE, BCGF, ABFE and DCGH.

(ii) Vertices of a Cube:

A cube has 8 vertices.

In the offered figure, the 8 vertices the the cube are:

A, B, C, D, E, F, G, H.

(iii) edge of a Cube: A cube has actually 12 edges.

In the given figure, the 12 edges of the cube are:

AB, BC, CD, DA, EF, FG, GH, HE, AE, DH, BF, CG. Note:

Here, in three-dimensional figures we will discuss around right prism arid constant pyramid.

### III. PRISM:

A solid whose two deals with are parallel airplane polygons and the side encounters are rectangles is referred to as a prism.

Triangular Prism: A triangle prism is consisted of of two parallel end-faces each one of which is a triangle and also three lateral encounters each among which is a rectangle. In the adjoining figure, ABCDEF is a triangle prism. (i) faces of a triangular Prism: A triangle prism has actually 2 triangle faces and also 3 rectangle-shaped faces. In the provided figure,

2 triangular faces are ∆ABC and also ∆DEF,

3 rectangular encounters are ABED, ADFC and CBEF.

(ii) Vertices of a triangle Prism: A triangle prism has 6 vertices.

In the given figure, the 6 vertices that the triangle prism space A, B, C, D, E, F.

(iii) edge of a triangular Prism: A triangle prism has 9 edges.

In the offered figure, the 9 edge of the triangular prism are:

AB, BC, CA, DE, EF, FD, AD, BE, CFNote:

A cuboid is also called a rectangle-shaped prism.

### IV. PYRAMID:

A pyramid is a hard whose base is a aircraft rectilinear figure whose side deals with are triangles having actually a usual vertex, dubbed the crest of the pyramid.

(a) Square Pyramid: It is a heavy whose base is a square and also whose side deals with are triangles having actually a usual vertex.

In the adjoining figure, OABCD is a square pyramid v its vertex at O. (i) Vertices of a Square Pyramid: A square pyramid has 5 vertices.

In the provided figure, OABCD is a square pyramid having O, A, B, C, D as its vertices.

(ii) deals with of a Square Pyramid: A square pyramid has faces one of i beg your pardon is a square face and the rest four are triangle faces.

In the offered figure, OABCD is a square pyramid having actually ABCD together its square face and also OAD, OCD, OBC and OAB together its triangular faces.

(iii) edge of a Square Pyramid: A square pyramid has 8 edges.

In the offered figure, the square pyramid OABCD has 8 edges, namely, AB, BC, CD, DA, OA, OB, OC and also OD.(b) rectangular Pyramid: It is a hard whose basic is a rectangle and whose side encounters are triangles having actually a typical vertex. In the adjoining figure, OABCD is a rectangular pyramid.

(i) It has 5 vertices, specific O, A, B, C, D.

(ii) It has 1 rectangular face, namely ABCD, and also 4 triangle faces, specific OAD, ODC, OAB, OBC

(iii) It has actually 8 edges, namely AB, BC, CD, DA, OA, OB, DC, OD (c) triangle Pyramid (Tetrahedron): that is a solid whose basic is a triangle and also whose side faces are triangles having actually a typical vertex. In the adjoining figure, OABC is a triangle pyramid.

(i) It has actually 4 vertices, specific O, A, B, C.

(ii) It has 4 triangle faces, specific ABC, OAB, OAC and OBC.

(iii) It has 6 edges, namely OA, OB, OC, AB, AC, BC.

● Three-Dimensional Figures

Three-Dimensional Figures

● Three-Dimensional figures - Worksheets

Worksheet on 3 Dimensional Figures

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