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Take any quadrilateral , say ABCD .Di...

Take any quadrilateral , say ABCD .Divide it into two triangles by drawing a diagonal . You get six angles 1,2,3 ,4,5 and 6 . Use the angles sum property of a triangle and argue how the sum of the measures of `angleA,angleB,angleCangleD` amounts to `180^(@)+180^(@)=360^(@)` .

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NAND LAL PUBLICATION-UNDERSTANDING QUADRILATERALS -SAMPLE PAPER FOR PRACTICE
  1. Take any quadrilateral , say ABCD .Divide it into two triangles...

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  2. Correct the statements given below . Parallel sides of the iso...

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  3. Sum of all the interior angles of a quadrilateral is 180^(@) ?.

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  4. Diagonals of the parallelogram bisect each other at right angles...

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  5. Minimum number of sides in a polygon is 2.

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  6. Fill in the blank spaces . A regular polygon each of whos...

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  7. Measure of each interior angle of a polygon is equal to 8 times...

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  8. Diagonals of the rhombus bisect each other at .

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  9. Sum of all interior angles of a n sided polygon is .

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  10. Number of diagonals in a hexagon are (i) 6 (ii) 5 (iii) ...

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  11. Which letter of English alphabet form simple closed curve?

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  12. Maximum exterior angle possible for a regular polygon (i) 60...

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  13. Quadrilateral in which measure of each angle is less than 180^(...

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  14. Identify the type of quadrilateral in the following . A ...

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  15. Identify the type of quadrilateral in the following . A ...

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  16. Identify the type of quadrilateral in the following . A ...

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  17. Identify the type of quadrilateral in the following . A ...

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  18. One side of the square is 36 cm and the side opposite to it ...

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  19. Each interior angle of a polygon is double the exterior angle...

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  20. One of angles of a parallelogram is 26^(@) more than its adja...

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  21. PQRS is a parallelogram and O is the point of intersection o...

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