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Number of diagonals in a octagen are...

Number of diagonals in a octagen are `underline(20)`.

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NAND LAL PUBLICATION-UNDERSTANDING QUADRILATERALS -ADDITIONAL QUESTIONS FOR PRACTICE (Objective Type Questions )
  1. The four angles quadrilaterals add upto 180^(@) (ii) unde...

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

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  3. Sum of all the interior angles of a pentagon are (i) underli...

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  4. Which of the folllowing cannot be the angles of a quadrilate...

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  5. Adjacent sides of the polygon are (i) Any 2 sides of the po...

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  6. Which is not correct ? (i) Equilateral Delta is a regular ...

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  7. Fill in the blanks . Every underline () is a rectangle .

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  8. Isosceles trapezium is a trapezium in which base angles are

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  9. Adjacent angles of a paralleogram are supplementary .

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  10. Sum of interior angles of a 9 sided polygon are

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  11. Number of diagonals in a octagen are underline(20).

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  12. If an angle of a parallelogram is a right angle then it is c...

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  13. If two adjacent sides of a rectangle are equal then it is cal...

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  14. State whether True or False . Diagonals bisect in a tra...

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  15. At least one angle of a concave quadrilateral is greater than...

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  16. state true or false: Diagonals of a rhombus are equal in length .

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  17. Isosceles triangle is a regular polygon .

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  18. Every curve is a closed curve .

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  19. Diagonal joins any two adjacent vertices of a polygon .

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  20. Non - parallel sides of an isosceles trapezium are equal .

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