Subject Mathematics

Students` Learning Outcomes

• Construct squares and rectangles with sides of given measure using protractor, set squares and straightedge/ruler.

Information for Teachers

• Follow these steps to draw a rectangle of length 8 cm and width 3 cm.
• Step 1: Draw a line and mark two points 8 cm apart and Call these A and B.
• Step 2: Use set-square or a protractor and draw right angles at A and B.
• Step 3: Use ruler and mark length of 3 cm on each of the right angles, and call the points C and D.
• Step 4: Join C and D to complete the rectangle ABCD.
• Follow w these steps to draw square of length 8 cm.
• Step 1: Draw a line and mark two points 8 cm apart and call them A and B.
• Step 2: Use set-square or a protractor and draw right angles at A and B.
• Step 3: Use ruler and mark length of 8 cm on each of the right angles, and call these points as C and D.
• Step 4: Join C and D to complete the square ABCD.
• Quadrilaterals: A closed figure with four sides and sum of its interior angles is 3600.
• A square: Have the following characteristics, as;
• All sides are of the same length.
• Opposite sides are parallel.

• There are four right angles.
• Both diagonals are equal and perpendicular to each other.
• Rectangles: Parallelogram with four right angles.

Material / Resources

Writing board, chalk/marker, duster, Geometry box, pencil, rubber, sharpener, textbook

Introduction

• Can anyone tell me that why do we use set-square? Why do we use protractor?
• Do you remember how to draw an angle with protractor? As we did for triangles.
• Do you remember how to draw right angle with set-square?
• Take their verbal feed-back and then ask them to draw two right angles one with protractor and other by using set-square. (Pair activity)
• Ask pairs to exchange their notebooks and check work.
• Then repeat the method once verbally.

Development

 Activity 1 Tell the students that today we discuss ruler, protractor to draw rectangle and square. Ask them if any of the students knows how to draw a rectangle by using ruler or protractor. Let them think and respond. If no one answered tell them “How to draw a rectangle by drawing it on the board?” Ask students to respond afterwards. pair work Split class in to pairs. Allocate time of 15 minutes. By drawing figures on the board ask students from each pair to come and respond. Then write questions on the board and ask them to attempt twice, once with rectangle and once with square.(pair work) Assign questions for homework. Hence today we learnt about drawing rectangles. Let`s repeat it together. Appreciate the correct work. Correct them where they are wrong. Similar method will be used for square. Step to draw square are mentioned above.

Sum up / Conclusion

• Squares and rectangles are quadrilateral.
• All the angles of squares and rectangles are right angles.
• All sides of square of same length.

Assessment

• Identify square and rectangle among the following pictures:
• What is difference between square and rectangle?