Hello friends here we are going to see a chapter called as Projections of solids in the subject engineering good let us get started in this video I described how many types of solids are there and how we are going to project them that we are going to see in this video [Music] projections of solids in this basically we need to know how many kinds of solids are there like for example cylinder is considered as a solid then there is khun kaew pyramid prism tetrahedral in etc these are the kinds of solids when we talk about cylinder it looks like this having a circle at the top and even at the bottom and having a height this is a cylinder then there is a cone which is having a circular base and n FX which is is a point Oh next there is Q you which is having all its dimensions as equal that is length width and height are equal in case of Q next pyramid pyramids are of different shapes and they are defined based upon the other number of edges of the base like maybe square pyramid having four edges at the base then then will be paint a little bit a bit having five base edges then example pyramid having six base edges and after that there is even after the new pyramid having eight base edges so if pyramid is defined based on the shape of its base like for example here I have drawn the diagram of a square pyramid in which we have four base edges and it is forming a square next all the base edges are connected to a point or a vertex which is point O so this is a square pyramid similarly we get a pentagonal pyramid which has five base edges accessible pyramid which has six base edges then the ris prism prism like i can consider cylinder which is having i talk a circle and even at the bottom that is a circle so cylinder can also be considered as a circular prism next cube can also be considered as a prism it means pleasure is that solid in which the base as well as we talk they are same it means if I am the base like for example if I draw a hexagonal prism hexagonal prism as hexagon means six sides at the top and units excites at the bottom and prisms they have all their faces as rectangles it means whatever is the shape of the top and the base the faces of the prism are in the form of rectangle like in case of pyramid the base edges may be of any given shape it may be square it may be hexagon or Pentagon but the sides are triangular faces in case of pyramid we have triangular faces in case of prism we have rectangular faces so this is the basic difference between a prism and a pyramid in juice of pyramid the base edge or the shape of the base defines the pyramid and at the top it is connected to a common vertex or a point or we can say a corner whereas in case of prism the base edges define the shape that is your pittance a hexagonal prism and hexagon is dead enter top and bottom whereas all the sites they are having rectangular faces next there is tetrahedron which is like a triangular pyramid [Music] tetrahedron is that solid in which all the faces are triangular as well as the base is triangular it means we keep tetrahedron anyhow we are going to get the same shape the same is not possible for some of these solids like for example pyramid if we are not keeping it on the square edge if we don’t do the triangular face then the orientation changes but in case of tetrahedron since all the faces even the base is in the form of a triangle even though we place it anyhow we are going to get the same shape so that is a tetrahedron next in case of solids as I have defined the vertexes for home and for prism in case of the other solids we have these edges or they are also called as sites like even in case of prism here we have edges or sides if the prism is of excellent shape it will have six edges then it will have six rectangular faces if there is when prism then it will have four base edges four sites and we can say for it rectangular faces so in short here I have described how many kinds of solids are there when we are talking about projection of solids in that case we would be tilting these solids that is the solids would be given to us in the initial condition like they are resting then we have contained them at a certain angle now that angle will be about an axis if we are having a solid like for example cylinder here is the axis of the cylinder which is the axis of symmetry which divides it into two equal parts so either we can take any of the solid about its axis like there is cone there is cylinder we can tell them about their axis or we can tell them or their face edges even in case of pyramids here I could draw the axis even in case of prism so here we can say that either of those solid will be tilted about its axis or it can be tilted about its base edge or any of the given conditions it means the solid will not be stable like this in the initial condition the solid will be resting after that depending on the question we have to make it inclined and when it is inclined how it will look like from the front view and from the top view that we are going to talk in case of projection of solids first we are going to start with two-stage problems in which there will only be two conditions and finally we are going on to three stage problems in which there will be three conditions so in short this was an explanation regarding the introduction of rejection of solids

so far you have not uploaded any videos from civil core subjects except engineering mechanics and strength of materials as these two subjects are common to all non circuit branches.

noise is more

Plz. Update projection of lines topic

sir r these videos enough for engineering drawing or still has to ne uploaded

sir please upload videos on civil core other subjects we are waiting as you uploaded only som and fm videos gr8 explanation the best teacher in my life that i have ever seen…

can u even do it on projection of lines?

@ekkeda I want to watch your private videos

Please upload the full lecture of E.D.

sir give us full lecture of engineering drawing for civil

I want to watch private videos

Please help others

U r great sir…….

Hello Friends,

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Thank you sir