QUADRILATERALS Class IX
Quiz 1 Made by Mrs. Pintu Prasad
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1. Diagonals of a parallelogram ABCD intersect at O. If∠BOC = 90º and ∠BDC = 50º, then ∠OAB is
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2. Three angles of a quadrilateral are 75º, 90º and 75º. The fourth angle is
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3. A diagonal of a rectangle is inclined to one side of the rectangle at 25º. The acute angle between the diagonals is
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4. . ABCD is a rhombus such that ∠ACB = 40º. Then ∠ADB is
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5. The quadrilateral formed by joining the mid-points of the sides of a quadrilateral PQRS, taken in order, is a rectangle, if
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6. The quadrilateral formed by joining the mid-points of the sides of a quadrilateral PQRS, taken in order, is a rhombus, if
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7. If angles A, B, C and D of the quadrilateral ABCD, taken in order, are in the ratio 3:7:6:4, then ABCD is a
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8. If bisectors of ∠A and ∠B of a quadrilateral ABCD intersect each other at P, of∠B and ∠C at Q, of ∠C and ∠D at R and of ∠D and ∠A at S, then PQRS is a
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9 If APB and CQD are two parallel lines, then the bisectors of the angles APQ,BPQ, CQP and PQD form
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10.The figure obtained by joining the mid-points of the sides of a rhombus, taken in order, is
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11. D and E are the mid-points of the sides AB and AC of ∆ABC and O is any point onside BC. O is joined to A. If P and Q are the mid-points of OB and OC respectively,then DEQP is
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12. The figure formed by joining the mid-points of the sides of a quadrilateral ABCD,taken in order, is a square only if,
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13. The diagonals AC and BD of a parallelogram ABCD intersect each other at thepoint O. If ∠DAC = 32º and ∠AOB = 70º, then ∠DBC is equal to
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14. D and E are the mid-points of the sides AB and AC respectively of ∆ABC. DE isproduced to F. To prove that CF is equal and parallel to DA, we need an additional information which is
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15. Which of the following is not true for a parallelogram?
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