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The sum of adjacent angles of a parallel...

The sum of adjacent angles of a parallelogram is

A

180°

B

120°

C

360°

D

90°

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The measure of one of the parallelogram is 70^(@) . Find the measures of the angles of the parallelogram . The following steps are involved in solving the above problem. Arrange them in sequential order. (A) 70^(@)+x=180^(@)impliesx=110^(@) (B) Let the angle adjacent to 70^(@) be x. (C ) The sum of the measures of adjacent angle of a parallelogram is 180^(@) . (D) The measure of the angles of the parallelogram are 70^(@),110^(@),70^(@) and 110^(@)

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NCERT EXEMPLAR-UNDERSTANDING QUADRILATERALS AND PRACTICAL GEOMETRY-EXERCISE
  1. If two adjacent angles of a parallelogram are in the ratio 2 : 3, then...

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  2. If PQRS is a parallelogram, then angleP – angleR is equal to

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  3. The sum of adjacent angles of a parallelogram is

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  4. The angle between the two altitudes of a parallelogram through the sam...

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  5. In the given figure, ABCD and BDCE are parallelograms with common base...

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  6. Length of one of the diagonals of a rectangle whose sides are 10 cm an...

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  7. If the adjacent angles of a parallelogram are equal, then the parallel...

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  8. Which of the following can be four interior angles of a quadrilateral?

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  9. The sum of angles of a concave quadrilateral is

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  10. Which of the following can never be the measure of exterior angle of a...

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  11. In the figure, BEST is a rhombus, Then the value of y – x is

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  12. The closed curve which is also a polygon is

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  13. Which of the following is not true for an exterior angle of a regular ...

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  14. PQRS is a square. PR and SQ intersect at O. Then anglePOQ is a

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  15. Two adjacent angles of a parallelogram are in the ratio 1:5. find all ...

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  16. A parallelogram PQRS is constructed with sides QR = 6 cm, PQ = 4 cm an...

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  17. The angles P, Q, R and S of a quadrilateral are in the ratio 1:3:7:9. ...

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  18. PQRS is a trapezium in which PQ||SR and angleP=130°, angleQ=110°. Then...

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  19. The number of sides of a regular polygon whose each interior angle is ...

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  20. If diagonal of a quadrilateral bisects each other at right angles then...

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