 Hello and welcome to the session. In this session, we will learn about prisms and surface area of a prism. Now we know that peri-hedral is a solid with flat faces and strange edges. Now here we can see various types of peri-hedral. Now all these figures are peri-hedral as they are the solids with flat faces and strange edges. Now let us discuss what is a prism? Now a prism is a peri-hedral, two identical and these faces, the basis of the prism, the lateral faces are the faces that join the faces. Now among these three peri-hedral are called the prisms. As here you can see that these three peri-hedral have two identical parallel faces. Now here you can see that in this prism we have two identical parallel faces that is the faces ABC and DEF. And here the faces that are joining the faces are called the lateral faces. So here the face ACFD, the face ABED are called the lateral faces. See you can see three faces in these two prisms also. Now let us discuss types of prisms. Now there are various types of prisms and a prism is made by the shape of its base, a triangular prism. Its base is in the shape of a triangle, that the base is in the shape of a rectangle. So this will be called a rectangular prism. The next prism is called a pentagonal prism and this prism is called a hexagonal prism. Triangular, a rectangular of prisms and a prism is made by shape of its base. How to draw a prism, a triangular prism, a rectangular prism, with only triangles. First of connect the vertices of the two triangles by long segments and hidden lines must be dotted lines. Now there are three faces of a triangular prism that we will look at now. Now let us discuss how to draw a rectangular prism and patterned rectangles. Then in the next step connect three corresponding Now the lateral faces of a rectangular prism, this rectangular prism, tissue box, book and the hexagons, that is, regular polygons with 600 prism, whose base will be hexagons that join the two hexagons by using a net, this area and the bases. The surface area in which is a net, now under prism, by using a net with dimensions 5 cm, 12 cm and 13 cm, since between the two bases the 10 cm will dry out. Now let us draw the net of this triangular prism. Now the bases of this triangular prism are triangles with height 5 cm, base 12 cm and 30 cm. Now first of all we will draw the rectangle with length 10 cm and width 5 cm in the rectangle A, B, C, D. Now here we can see the given diagram with the edge A, B triangle A, F, B is attached to the rectangle A, B, C, D. We will draw these two triangles A, B, F, B, D, E with the edges of the rectangle A, B, C, D. Now we can see in the given diagram with the edge B, C, rectangle B, F, E, C is attached and with the edge A, D, rectangle A, F, E, D is attached. We have drawn these two rectangles. Now we will draw of this triangular prism by adding the areas of all these faces of rectangle F, B, C, E will be equal to length into width that is 13 into 10 which is equal to 130 cm square. Now rectangle A, F, E, D will be equal to 12 cm into 10 cm which is equal to 120 cm square. A, B, C, D will be equal to 10 into 5 that is 50 cm square. Now area of triangle equal to area of triangle B, D, E into base. Now base area is 30 cm into height that is 5 cm. So this is equal to 2 into 6 is 12 and 6 into 5 is 30, 30 cm square that is the triangle C, D, E is also 30 cm square. Now to find the surface area of this triangular prism, these areas of the given triangular prism is equal to 130 cm square plus 50 cm square plus 120 cm square plus 30 cm square plus 30 cm square which is equal to 360 cm square. So in this way we can also find the surface area of all types of prisms by drawing the net of the prism. Just remember that surface area of the prism will be the sum of the areas of all the faces of the prism. So in this session we have not about of the prism and this completes our session. Hope you all have enjoyed this session.