K J Somiaya Comprehensive College of education. PPT presentation of CAP

1. K J Somaiya Comprehensive College of Education, Training & Research Name : Monica Panda Roll No : 44 Subject : Mathematics Topic : Quadrilaterals Standard : VII

6. Quadrilateral Family parallelogram rectangle rhombus square trapezoid

9. * In quadrilateral ABCD, the vertices are A, B,C, and D * Adjacent vertices are : A and B B and C C and D D and A * Opposite vertices are : A and C B and D A B C D

10. * Adjacent sides -Two sides with common vertex are : AB and BC BC and CD CD and DA DA and AB * Opposite sides are: AB and DC AD and BC A B C D

13. Segments joining opposite vertices like AC and BD are called diagonals of the quadrilateral. There are 2 diagonals in a quadrilateral . A D C B

14. QUADRILATERALS EXTERIOR OF QUADRILATERAL INTERIOR OF QUADRILATERAL A B C D E . . . . . . G H F J I QUADRILATERAL

15. PROPERTIES OF A QUADRILATERAL

18. QUADRILATERALS EXPERIMENT AIM: To verify that the sum of 4 angles of a quadrilateral is 360 degree. 1. Draw 2 [congruent] quadrilaterals of same shape and size.

19. QUADRILATERALS 2. Draw arcs of same radii at the 4 vertices of the quadrilateral. 3. Colour the region enclosed as shown in the figure.

20. QUADRILATERALS 4. Glue the figure1 in the note book. 5. Separate the angles in figure2 by zig-zag lines as shown.

21. QUADRILATERALS 6. Cut the 4 angles of figure2 as shown.

22. QUADRILATERALS 7. Arrange the angles and paste them side by side. OBSERVATIONS: 4-angles of quadrilateral can be assembled in to a circle. 4-angles of a quadrilateral gives a complete angle. The sum total of the 4 angles of quadrilateral is 360 0.

23. EVALUATION

26. What is the missing angle? 81 º 58 º 109 º ? A D C B