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.

You are watching: Which three-dimensional figure has exactly three rectangular faces?

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

8th Grade mathematics Practice From Three-Dimensional numbers to home PAGE


New! Comments

Have her say around what you just read! leave me a comment in package below. Asking a question or price a Question.

See more: What Is The Perimeter Of An Acre In Miles, Perimeter Of 20 Square Acres


Didn"t uncover what you were looking for? Or desire to know much more informationabout Math only Math.Use this Google search to uncover what you need.


Share this page: those this?


FacebookTwitterPinterestWhatsAppMessenger
Subscribe come This Site
E-mail Address
First Name
Then Don't concern — your e-mail attend to is entirely secure. I promise to usage it only come send girlfriend Math only Math.