 I am P. V. Ekhande, working as an assistant professor in Department of Mechanical Engineering at Valgenstrup Technology Solar Board. So, today we will be observing the procedure for finding out strike and dip of the triangular plane and at the end of the session, the students will be able to find strike and dip of the triangular plane. So, let us consider this problem in this, we have to refer the figure. So, figure is given and from the given figure, we have to find out the strike and dip of the plane. So, plane is L M N for which front view and top view is given. So, front view top view in which the points are denoted as L F, M F and N F. So, this is the front view and this one is top view. Now, for obtaining the strike and dip of the plane, the certain steps are to be followed, those are to be continued on this figure so that we will get the edge view of the plane and once we get the edge view of the plane, then we will be able to mention the strike and dip of the plane. Basically, what is meant by the strike? So, strike is nothing but the bearing of the true length line which is in the horizontal condition for that bearing is called as a strike of the plane. Means we should have the horizontal line in the front view, so that is the line parallel to ground or that line is the horizontal line which appears parallel in this front view. So, we will indicate true length in the top view and the bearing of that line is strike of the plane. So, that is first part which is strike of the plane and second is dip of the plane. In the dip of the plane, there are two things, one is the dip direction and other is dip angle. So, we will be finding out dip angle as well as dip direction. So, step by step we will observe the procedure over here. Now, in this first we will draw the line parallel from NF because that line will be inside the plane. So, this line is inside the plane and we can obtain the point intersecting to the LM line and then that point can be projected in the top view to obtain the true length line. Now, here first we will complete the line parallel from NF position. So, from NF we will draw the parallel line and this line will have the intersection on this line. So, this intersecting point for instant will denote as a intersecting point P and suffix F will mention because that is the point in the front view. So, we will mention that with the suffix F. Now, to obtain P point in the top view, we have to project the point from this P F position in the top view side and the intersection must be obtained on the respective line that is ML line. So, on LM line we will get the intersection in the top view and that is to be denoted as that is to be denoted as a P edge and then it is to be connected to the point N in the top view. So, first we will have the projection. So, projection of this will take in the top view side. So, as told to you projectors are always to be drawn as a faint line because that is the construction line and the intersection of this is on both the lines that is LM line as well as LN line. But as per the point of intersection knowledge, we should take the point on the respective line means ML line. So, on ML line we will have the intersection as a P point with the suffix H. So, this is point which is obtained in the top view. Now this line P N is in the 2 length. So, line P N is in the 2 length and this line I am showing with the green color. So, this line is a 2 length line and the strike bearing of this line which is in the 2 length for the horizontal condition is nothing but the strike of the plane. So, the strike is to be measured with respect to N point. So, here we will consider the quadrant from north to west. So, 4 directions as which are known to you the upward direction is north direction. This direction is west direction and the angle which is subscribed between this vertical line and the 2 length line which is called as a strike line. So, 2 length line or this line is a strike line is to be measured and that angle if we measure from this vertical line here the angle is 10, 20, 30 and 30. After that to get the exact position we must have the extension of this line so that the exact intersection will be obtained. Now this line when you observe 10, 20, 30, 40, 50 and 60 means the angle subtended between the vertical line which is starting from this center that is O is a north line this is west line. So, strike of the plane we can mention as north 60 degrees west. So, strike of the plane is north 60 degrees west now to get the deep angle and the deep direction we must draw the line perpendicular to this strike line to get the edge view of the plane because deep angle can be obtained only when the plane is indicating the edge view. So, we will draw the plane perpendicular to this that plane perpendicular to this means that is nothing but the reference line which we are drawing over here. So, this reference line is h 1 line. So why we are indicating this as a h 1 because this line is intersection of horizontal plane and auxiliary plane number 1. So, this area is of horizontal plane this is of auxiliary plane number 1 that is why we are writing this line as a h 1 line. Now on this projector we have to mark the distance of either pH or N sorry P of or NF because that distance is to be marked on the projector which is starting from N or P that indicates the position of P 1 point or that is nothing but N 1 point because it is on the same line same projector. Now to obtain the second point where to draw the projector from L point on the projector of L the distance of L is to be marked. So, distance L that is to be marked LF distance that will take in compass from this plane and that will mark from the reference line. So, this distance we are observing which is transferred from this side. So, the distance of LF so this distance we are taken and that we have marked over here. So this point is L 1 point and to obtain the M point we can have the position of M by taking the projector of this M point. So, we will take the projector of M and on the projector of M when you have the line connecting from this L point the intersection will be obtained as a M point. So, this point is M 1 point now M 1 point which is obtained so that we will have the line connecting from L 1 this is M 1 point and M 1 and this indicates H V of the plane. So, that indicates H V of the plane. Now the angle of this plane with respect to ground or with respect to HRP is dip angle. So, this dip angle will measure either at this location by extending this line or at the same location at the different locations on the line we can measure the angle. Suppose if you want to measure the angle at the L position we can draw the line passing through this L and with respect to this we can measure the angle. Now the angle substituted between this horizontal line and the HVO is 59.5 means now the dip angle of this plane is now the dip angle of this plane is 59 degrees or exactly 59.5 degrees. So, this angle is 59.5 degrees which is a dip angle. Now regarding dip direction it is the direction of the plane towards the ground or downward inclination of the plane is to be indicated in the top view which is with respect to strike line. But the angle is to be measured with respect to this line and that angle we have already measured as a 59.5 and downward inclination that is to be observed over here. So, when we consider the man position over here with respect to this in this direction the plane is having downward inclination with respect to this man when you consider this direction this direction is a direction in which the plane is going in the upward direction. So, this is not to be considered whereas this side is to be considered this direction is to be considered. So, this direction just we are observing in this view, but it is to be mentioned with respect to strike line as a line perpendicular to strike line. So, this direction is a dip direction. So, this direction is a dip direction now this dip direction is in which quadrant that is in the third quadrant or that is in the quadrant south to west. So, dip direction is south westerly for this plane, dip direction is we can mention as a south west or that is south westerly. So, this is the procedure for obtaining the strike and dip of the plane. Thank you.