Properties of Parallelogram

Contents

Objectives

Being able to deduce the properties of parallelogram.

Estimated Time

40 minutes

Prerequisites/Instructions, prior preparations, if any

knowledge about parallel lines, adjacent angles, supplementary angles, diagonals, quadrilaterals,

Materials/ Resources needed

Digital : Click her to open the file

Non-digital : Paper, pencil, ruler, compass, protractor

Process (How to do the activity)


Download this geogebra file from this link.

Procedure:

  1. The teacher can use this geogebra file to introduce parallelograms to students.
  2. Move the vertices A or B or D and observe different parallelograms formed like square, rectangle and rhombus.
  3. Bring their attention to measures of sides, angles and diagonals.
  • Developmental Questions:
  1. Can you identify the figure ?
  2. How many sides does this figure have ?
  3. What do we call a figure with 4 sides ?
  4. Are all 4 sides equal ?
  5. What are parallel lines ?
  6. Identify the 2 sets of parallel lines.
  7. Spell out the differences between the figures formed with respect to sides, angles and diagnols.
  8. What common features do you observe in all figures/shapes formed ?

Evaluation at the end of the activity

  1. Are square, rectangle and rhombus parallelograms ?
  2. What are parallelograms ?
  3. How many pairs of parallel lines does a parallelogram have
  4. Is kite a parallelogram ?

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