Lesson Planning of Drawing Angles


Lesson Planning of Drawing Angles

Subject Mathematics

Grade 5th

Students` Learning Outcomes

  • Draw a right angle using a protractor.
  • Draw acute and obtuse angles of different measurements using a protractor.
  • Draw an angle using a protractor.
  • Equal in measure to a given angle
  • Twice the measure of a given angle
  • Equal in measure of the sum of two given angles             

Information for Teachers

  • To draw an angle of 50 degrees, first draw a line segment that is to be the one side of the angle.
  • Then place the protractor so that its zero line matches with your line segment and that the vertex is in place. Then put a little mark at the spot showing 50 degrees
  • Take the protractor off and draw a line through your mark.

Material / Resources

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


  • Recall the construction of vertical line in Horizontal by using Set-Squares.

Drawing Angles

  • Ask any of the students to repeat and then introduce another way of drawing it.



Activity 1

  • Say: “We can also use a protractor to construct a right angle”. Using the straight edge of the chalkboard protractor, draw ray AB. 
  • Say: “We are going to construct a right angle with its vertex of point A. How should we place the center point of the protractor?” (Place the center point of the protractor on point A and the 0 line of the protractor on ray AB” ask a student to demonstrate this at the board with the large protractor.
  • Say: “Through which marking on the protractor scale should the other side of the right angle pass?” (90)


  • Ask a student to place a point on the board at the 90 mark, label it point C. remove the protractor and draw a ray from point A through point C.



  • Ask: “How can we be certain that we have constructed a right angle?
  • (It measures 90 we can match against a known right angle, such as the corner of a page in a book).
  • What are the correct names for this angle?” (We can call it angle A, Angle BAC, or angle CAB.)
  • Ask a student to write the angle names on the board as the others write them in their notebooks. Repeat the procedure by constructing additional angles.



  • Assign practice questions from book to work individually and Followed by peer checking.



  • Ask them to draw 5 angles of their own choice and label them.


 Follow up






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