Surface Area of Triangular prism مساحة سطح المنشور الثلاثي

hello everyone how's everyone saying okay today hope i'm going to talk about the surface area of triangular breasts this is our lesson for today for this week number three and here this is our lesson overview and here the important for all of us are thirteen you can work in it and you can solve it and if you want any help you can contact me and i'm trying to help you fulfill this disturb top our objective for today we are going to work on how how you can create on it to represent that triangular crease and use it to frame surface earlier okay after that this our big question how can the crisp prism be unfolded to make two dimensional net okay here our vocabulary for today the surface area and the triangular prism after that we are going to have definition of surface area and the triangular frizz as we know before as we know before what the meaning of the surface area of triangle the surface area meaning i'm going to find the area of all the faces then adding together it will give you the surface area okay for example here if have this one this shape or this figure as you can see this one called triangular prism and ask yourself why you call this one triangular press what is this one through increase because here the base here the base here it's like triangle here is this one is triangular that's why we call this one here this one that's why we call this one triangular triangular press we call this shape especially the 3d depending on that piece like for example here the piece here the triangle that's why we call this one train blur paris okay as you can see here if you ask yourself how many pieces here you have here you can have five faces so that how can find the first how can find the surface area we need to find the area for each phase then add it together so that you have here this one as you can see here in front of you this one triangle and also another side is one triangle and it is here here as you can see here in the bottom here it will be here rectangle and the two side also you have hair rectangle and the hair rectangle and you have also another the rectangles at the bottom so that you have five faces here draw anthropo and it will present triangular press what is the first thing you are going to do we are going to make net and you are going to compose the figure so that we can find the surface area for this shape let's do this one here the step number one draw until the bottom rectangular phase and is two triangular basis okay let intro grid found you'll need to present one foot the bottom faces rectangle so that as told you support specific rectangle with side lenses of 12 8 and the 15 feet the pieces are triangular triangles that have the bead here as you can see here this one here this triangle destroying there you have here the base here 12 and here the height it will be 15. as you can see here we are going here to draw this one on the net to compose or to showing the this figure after we are going to pick up all the pieces so that here is the page we have two basically are same exactly because of them they are triangle they are congruent meaning the area for this triangle same exactly the area for the second triangle here check there so that here this is the second step we drew until about the side rectangular so that you have the side two sides here sides and also you have another side it will be also showing the step number three the side face is rectangular with with side length here here the third this is feet and here also here 15 and the hair five feet for this side you have rectangle with length and width okay let's go for step number three this final shape after you are going to compute the rectangular prism so that it would be here as you can see here the side and the top and the bottom and the bottom here and the base here and the piece here okay so that am now make an to represent the the rectangular as triangular prism okay triangular prism okay so that here can find the surface area what you would do what would you so easy now you can work on it okay you can find the area for this one here go multiply 15 by 13 because this one rectangle and you know already the area of rectangle we are going to multiply the length by width here is the bottom it will be also 12 multiplied by 15. and also here the rectangle is the triangle we know already the area for triangle it will be nose one out of two one out of two or divided by two so that need to find also the area for the side and the other side also rectangle we're going to multiply the length by width okay so that here this area it will be same this over here because both triangles are same or will call this one congruent okay and then find the area of all adding together it will give you the surface area there is some example from our life here you can read this one and try to work on its theme exactly from the other one and try to find the the surface area here some example coming from test practice before here give you already he composed already the figure of triangular print need to find the surface area of this shape okay and here here some also you can use an to also compute this shape you have to find the to find the surface area of this shape okay that's good so then you can complete your homework online draw and level down it to so that need to know the important thing for you to know and that triangular presence consists of consists of five faces two triangle they are also same and after that we have three we have three rectangle but they are different they are not same if you found that want to find the surface area of sometimes because this one is find the area for this triangle and then multiply by two we put this one and this one same find the area of this one find the area for this one then after that you are going to add it together it will give you here it will give you here the surface area of this shape this hour our your turn you can work on it okay you can work in this activity you have activity third one you can here it's already soldering there's triangular prayer and they already decompose it for you and you don't need to find the surface area and there's also another activity too and also another search order and we have activity number three you can work on it and really it's too nice activity you can solve it and you if you have any if you want any help you can contact me when and this is our lesson for today thank you for watching and have nice day