Shapes that are congruent

Objectives

To understand how the shapes are congruent

Prerequisites/Instructions, prior preparations, if any

Prior knowledge of point, lines, angles, parallel lines, closed figure

Materials/ Resources needed

• Digital : Computer, geogebra application, projector.
• Non digital : Worksheet and pencil,6-8 strings (preferably in different colors)
• Image files :
  1. “F-pentomino_Symmetry.svg”
  2. “L-pentomino_Symmetry.svg”
  3. “Congruence class image7.png”
  4. “Congruence class image8.png”

Process (How to do the activity)

Use image files - “5. F-pentomino_Symmetry.svg”,“6. L-pentomino_Symmetry.svg”, “7. Congruence class image7.png”

• Are the things in the picture same?
• Which among them are same? Children can point out shapes that are same
• How can you say they are same?
• An example of how palms are same can be discussed, how can you place your palms to say that they are same
• HW. Make figures from sets of 5 squares: Cut out 5 squares of 1cm each with a newspaper. Try to make different shape with the 5 squares.How many different shapes are possible? (Stick in you note books any one of the combinations)

Use image file - “8.Congruence class image8.png”

• Name all the shapes in the picture.
• Point out figures that are of same shape.
• What about their size?
• Find figures that are exactly same.
• What do you call two things that are exactly same. What are the parameters that are required for two things to be exactly same(shape and size)?
• Establish concept of congruence and define the concept

Evaluation at the end of the activity

• Students should be able to define congruence and identify shapes that are congruent