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The number of diagonals in a hexagon is ...

The number of diagonals in a hexagon is __________.

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NCERT EXEMPLAR-UNDERSTANDING QUADRILATERALS AND PRACTICAL GEOMETRY-EXERCISE
  1. The measure of each angle of a regular pentagon is .

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  2. The name of three-sided regular polygon is .

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  3. The number of diagonals in a hexagon is .

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  4. A polygon is a simple closed curve made up of only .

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  5. A regular polygon is a polygon whose all sides are equal and all are ...

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  6. The sum of interior angles of a polygon of n sides is right angles.

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  7. The sum of all exterior angles of a polygon is .

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  8. is a regular quadrilateral.

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  9. A quadrilateral in which a pair of opposite sides is parallel is .

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  10. If all sides of a quadrilateral are equal, it is a .

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  11. In a rhombus diagonals intersect at angles.

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  12. measurements can determine a quadrilateral uniquely.

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  13. A quadrilateral can be constructed uniquely if its three sides and an...

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  14. A rhombus is a parallelogram in which sides are equal.

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  15. The measure of angle of concave quadrilateral is more than 180°.

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  16. A diagonal of a quadrilateral is a line segment that joins two vertic...

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  17. The number of sides in a regular polygon having measure of an exterior...

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  18. If the diagonals of a quadrilateral bisect each other, it is a .

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  19. The adjacent sides of a parallelogram are 5 cm and 9 cm. Its perimeter...

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  20. A nonagon has sides.

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