Students` Learning Outcomes
 Recognize the kinds of quadrilaterals (Square, Rectangle, Parallelogram, Rhombus, Trapezium and kite).
Information for Teachers
Quadrilaterals:
 A closed figure with four sides and sum of its all interior angles is 360^{0 }
Square:
 All sides are of the same length.
 Opposite sides are parallel
 There are four right angles
 Diagonals are equal.
Parallelogram:
 Opposite sides are parallel.
 Opposite sides are of same length.
 Consecutive angles are supplementary (their sum is equal to 180^{0})
 All quadrilaterals, except for trapezium and kite are considered parallelograms.
Rectangles:
 Opposite sides are of the same length and parallel.
 There are four right angles.
 Consecutive angles are supplementary.
 Diagonals are equal.
Rhombuses:
 Parallelogram with four equal sides and equal opposite angles.
 Opposite sides are parallel.
 Diagonals are not equal.
Trapezium:
 Have only two parallel sides (one pair)
Kite:
 Have two pairs of equal (adjacent) sides.
 Each angles is less than 180^{0})
 Consult text book at all the steps wherever required.
Material / Resources
Writing board, chalk / maker, duster, one figure drawn on A4 paper. (One or two sets according to strength), scissor, geometry box, textbook
 Following pictures distribute among students and ask are these triangles.
 If they say “NO” then ask them why they said not and then introduce that Closeshape with four sides is known as quadrilateral.
 Introduce name of each of quadrilaterals with following figures i.e., square, rhombus, trapezoid, rectangle. However, don`t explain the properties of these.
Development
Activity 1
 Write names of all five quadrilaterals on board.
 Divide the class into 5 or 10 groups and give each group a sheet with one quadrilateral on it.
 Students need to name their quadrilateral, as specially as possible, and then cut it out.
 Use rulers and protractors to draw and measure diagonals and angles. Find as many relationships as possible between opposite sides, opposite angles, and diagonals.
 Ask them to find answer of following questions:
 Relation between lengths of sides
 Relation between angles
 Find supplementary angles.
 Number of parallel pairs
 Ask each group to record its findings and write inside the shape.
 Invite one presenter in front of class and present the quadrilateral given to that group..
 Distribute a worksheet or draw the given table on board and then check mark each characteristic for reinforcement.
 Teacher leads students to recognize relationships between quadrilaterals and fill the table.
 Ask them to look for things similar to these quadrilaterals and write their names. This can be given as Home work as well.
 Wrap up the activity by drawing each figure on board and repeating its characteristics with whole class.
Sum up / Conclusion
 Quadrilateral just means “four sides” (quad means four, lateral means side).
 Any foursided shape is a Quadrilateral.
 But the sides have to be straight, and it has to be 2dimensional.
Properties:
 Four sides (or edges)
 The interior angles add up to 360 degrees.
Types of Quadrilateral:
Assessment
 “Name that Quadrilateral”
 Is it a square or a rhombus?
 Draw a Trapezoid on board and ask why it is not a Rhombus?
 (Students will have to decide after thinking about properties of both. Similarly you can give questions for any of two shapes.)
 Conduct a game in class “Pass Word”. One group will give clues to the other group and they have to find the figure.
 Prepare True / false questions, such as; every rectangle is a parallelogram. True / False
 Every square is a quadrilateral. True / False
 A rhombus is a kite also. True / False
 Involve the students in solving the exercise questions given at the end of the lesson of text book.
Follow up
 Tick the appropriate box according to the given pictures below.
Quadrilaterals 


Parallelogram 
Rectangle 
Rhombus 
Square 
Kite 
Opposite sides parallel 





Opposite sides equal 





Opposite angles equal 





Consecutive angles supplementary 





four rightangles 





four equal sides 





diagonals bisect each other 





diagonals congruent 





diagonals perpendicular 





Diagonals angle bisect. 




