Introduction to Geometry


Lesson Planning of Introduction to Geometry

Subject Mathematics

Grade 5th

Students` Learning Outcomes

  • Know instruments of a geometry box (pencil, Straight edge ruler, set squares and protractor)

Information for Teachers

  • Protractor: This is a protractor. It is used to measure angles.


  • Note: how it has the shape of half a circle; therefore it only measures angles up to 180.
  • It has two sets of numbers: one set goes from 0 to 180 one way, one set from 0 to 180 the other way.
  • A Divider: A divider, also known as a measuring compass, is a mathematical or drafting instruments of the length of irregular lines and of distances on maps or charts.


  • Set Square: Set Squares are useful for drawing parallel lines and perpendicular lines.
  • Compass: A device known as a compass (or pair of compasses) is used by mathematicians and craftsmen in geometry to draw or inscribe or arc.
  • A Ruler: A ruler is used to measure length of a straight line. It has centimeter and millimetre scales on it.


Material / Resources

Writing board, chalk / marker, duster, geometry box, textbook


  • Divide the class into groups with mixed ability.


  • Ask them to open their geometry boxes and guess about its usage. (10 min)
  • Take each group`s feedback and then introduce the correct use, write the name and one sentence for each on board.
  • Rearrange their seats.
  • Development


Activity 1

  • Repeat the uses with students once again.



  • Erase the board and give them time to write on copies about each of the tools.
  • Peer checking (they will check each other`s work and do corrections)
  • Ask them to close their note books and ready for the game “Who am I?”(Expected answer would be as; Set Square)


  • (For the first time teacher can conduct it but later students can also forward the question statement, such as;
  • Statement: My one side is ‘L’ shaped, I am empty from middle and I have a friend also, who am I? (Expected answer would be as; Compass)



Sum up / Conclusion

  • Conclude the lesson in brief to introduce the instruments of the geometry box.


  • Q- A Session
  • Who am I? as explained above.
  • Draw a table in their notebooks with one line introduction about each


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