TAILIEUCHUNG - Lecture General mathematics: Lecture 25 - Ms. Fehmida Haroon

The main contents of this chapter include all of the following: Vertical asymptotes, horizontal asymptotes, oblique asymptotes, graphing functions with asymptotes, graph of f from the graph of f’. | General Mathematics ADE 101 Unit 3 LECTURE No. 25 Surface Area And Volume Of Cube And Cuboid 1 Today’s Objectives Knowledge Test Three-dimensional figures have faces, edges, and vertices. A face - is a flat surface, and edge - is where two faces meet, and a vertex - is where three or more edges meet. How many faces do most three-dimensional figures have? DESCRIPTION: Take your pencil box out. Keep it in front of you and do as directed. Move your finger along the edges as shown by the red path on the slide. How many edges are there in your box? Put a dot, using your pen at the corners of your box. How many ink dots did you put? BACK FRONT Place your hands on the top and bottom surface of your box. Now, place your hands on the right and left, vertical surfaces, of your box. Now, place your hands on the front and back side vertical surfaces of your box. l b h l b h b l h l h b LENGTH , BREADTH AND HEIGHT are called the “three dimensions” of the cuboids. LENGTH , BREADTH AND HEIGHT [3 dimensions ] gives the complete description of the cuboids. DIMENSIONS Take 18x16 sheet. Mark 4x4 squares at 4 corners. How do I make a OPEN cuboid of l=10cm, b=8 cm and h=4cm? Cut those squares from the 4 corners. Join the adjacent sides of the squares, vertically up, to get the open box 10x8x4 10 cm 4 cm 8 cm Cuboids 10 To find the surface area of a shape, we calculate the total area of all of the faces. A cuboid has 6 faces. The top and the bottom of the cuboid have the same area. SURFACE AREA OF A CUBOID 11 11 Discuss the meaning of surface area. The important thing to remember is that although surface area is found for three-dimensional shapes, surface area only has two dimensions. It is therefore measured in square units. To find the surface area of a shape, we calculate the total area of all of the faces. A cuboid has 6 faces. The front and the back of the cuboid have the same area. SURFACE AREA OF A CUBOID 12 12 To find the surface area of a shape, we calculate the total area of

• Toán học
• General mathematics
• Lecture General mathematics
• Geometric measurement
• Algebraic thinking
• Mathematical knowledge
• Constant functions
• Number pattern
• Cartesian coordinate system
• Liner equations
• Graph of liner equations
• Linear equation
• Natural numbers