VISUALISING SOLID SHAPES.pptx

Visualizing Solid Shapes

1. VISUALISING SOLID SHAPES POOJA CHAUDHARY B.ED 2020-2022 IAMR B.ED COLLEGE

2. Contents What is shape 2-D Shapes 3-D Shapes What are Faces, Vertices and Edges? Views of Solid Shapes  How to Visualize a Solid Shape?

3. What is shape ? A shape is the form of an object or its external boundary, outline, or external surface , as opposed to other properties such as color, texture, or material composition. Psychologists have theorized that humans mentally break down images into simple geometric shapes called geons. Examples of geons include cones and spheres.

4. 2-D Shape or Plane Figures 2-D shapes are plane geometric figures made up of either straight or curved lines. They only have length and width (breadth). 2-D shapes do not have any depth. Circles, triangles, squares and rectangles are some examples of 2-D shapes. Shapes that are made up of three or more straight lines are referred to as 'Polygons’.  Some common 2-D shapes are circle, oval, triangle, square, diamond, rhombus, parallelogram, rectangle.

5. Examples of 2-D Shapes POLYGON QUADRILATERALS CIRCLE TRIANGLE SQUARE RECTANGLE PENTAGON HEXAGON OCTAGON

6. 3-D Shape or Solid Shapes A 3-D shape or a solid shape has a length, width and height.  A solid shape occupies some space and rests on one or more surfaces. Cubes, cones, spheres, cuboids are some examples of solid shapes. Many real-world objects like a book, laptop, ball, birthday cone resemble solid shapes. Some of the 3-D shapes are cuboid, sphere, cone, cylinder, pyramid, cube.

7. Examples of 3-D Shapes CUBE CUBOID SPHERE CONE CYLINDER SQUARE BASE PYRAMID

8. What are Faces, Vertices and Edges?

9. Faces Every single surface of a solid shape is called a face. For example, a cube has 6 faces. Observe the figure shown below that shows a face of a cuboid.

10. Vertices In a solid shape, a 'Vertex' is defined as a point where two or more lines meet. Vertices is the plural form of the word 'Vertex'. A sphere is an exceptional shape which does not have a vertex. Observe the following figure which shows the vertex of a cube.

11. Edges In a solid shape, an 'Edge' is defined as a line segment joining two vertices or two corners. The following figure shows the edge of a cube.

12. Views of Solid Shapes  All solid shapes have a top view, a side view and a front view. Let us check out each one of them. Top View: The top view of a solid shape is the shape of an object when we see it from the top. Side View: The side view of a solid shape is the shape of an object when it is seen from one of its sides. Front View: The front view of an object is the shape of an object when it is seen from the front side of the object.

13. Observe the cube given below which shows its top, side and front view. 3-D View – Front, Side and Top

14. How to Visualize a Solid Shape? A solid shape can be visualized in many ways. Some of them are listed below.  Visualizing a Solid Shape by c utting i t : Visualizing an Object by its shadow: Visualizing Solid Objects by imagining the smallest unit

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