In 3rd grade geometry us will talk about inbrief about some that the common solid figures named below:(i) Cube: definition of cube, components of a cube, properties of a cube.

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(ii) Cuboid: meaning of cuboid

(iii) Cylinder: definition of cylinder

(iv) Cone: definition of cone

(v) Sphere: an interpretation of sphere

Definition the a cube:

An object which looks choose solid box-shapedthat has six the same square faces.

A cube has actually 6 equal and airplane surfaces. Allthe faces of a cube are square in shape.


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Two adjoining aircraft – surfaces meet at anedge. There are 12 edges in a cube and also all the 12 edges space equal in length.These edges room straight edges.

The meeting suggest of two edges is called avertex. In a cube there room 8 together vertices.

Parts that a cube:

(i)Face: Face is likewise known as sides. A cube has actually sixfaces and also all the deals with of a cube space square in shapes. Each challenge has fourequal sides.

(ii)Edge: once two edges satisfy each other a line segmentformed. There are 12 edges in a cube. All the 12 edges are equal in lengthbecause all faces are squares. These edges are straight edges.

(iii)Vertex: as soon as three edges fulfill each various other a pointformed. There are 8 vertices in a cube.

(iv)Face Diagonals: challenge Diagonals that a cube is currently segment the joins the opposite vertices the a face. There room 2 diagonalsin each challenge so altogether there space 12 diagonals in the cube.

(v) SpaceDiagonals: an are diagonals that a cube room the linesegment that joins the opposite vertices that a cube, cutting through itsinterior. There space 4 space diagonals in a cube.

Properties of a cube:

Volume: The volume of a cube is s3 wherein s is the length of one edge. Surface Area: The surface area the a cube is 6s2, whereby s is the length of one edge.

Definition the cuboid:

The cuboid has actually 6 rectangular faces. Theopposite rectangular airplane surfaces are the same (equal in all respects). Ithas 8 vertices and 12 edges.

In a cuboid there space 6 rectangular planesurfaces. There are 8 vertices and 12 edges.


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A cube is also a cuboid having actually all that is 6faces equal and also square. Thus, a cube has actually all the six encounters identical, whereas acuboid has the opposite encounters identical.

Properties the a cuboid:

Formulas for the over rectangular box:

Volume: The volume that a cuboid is lwh, whereby l is the length, w isthe width and also h is the height.

LateralSurface Area: The lateral surface ar area that a cuboidis 2lh + 2wh, where l is the length,w is the width and also h is the height.

SurfaceArea: The surface ar area of a cuboid is 2lw + 2lh +2wh, where l is the length, w is the width and h is the height.

Definition the cylinder:

A cylinder stands on a one planesurface having circular airplane surfaces top top its top and also bottom. Therefore a cylinderhas two circular aircraft surfaces, one in ~ its base and also another in ~ its top. The hasa curved surface in the middle.

It has two edges, in ~ which the two planesurfaces fulfill with the bent surface. This edges are curved edges.

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In a cylinder there space 2 aircraft surfacesand 1 curved surface. There are 2 edges and also no vertices.