Ncert-maths-Quadrilaterals-Set A Welcome to your Ncert-maths-Quadrilaterals-Set A 1. The quadrilateral formed by joining the mid-points of the sides AB,BC,CD,DA of a quadrilateral ABCD is a trapezium but not a parallelogram a quadrilateral but not a trapezium a rhombus a parallelogram only None 2. If D is mid-point of the side BC of a triangle ABC and AD is perpendicular to AC then (a²c²)/b² 1 3 4 2 None 3. In a quadrilateral PQRS,∠P,∠Q,∠R and ∠S are interior angles. If ∠P:∠Q:∠R:∠S=1:2:3:4, then which angle is equal to 144º ∠P ∠S ∠Q ∠R None 4. If the angle of a quadrilateral are xº ,(x−10)º,(x+30)º and 2xº, then the greatest angle is: 136º 68º 180º 148º None 5. If length of each side of a rhombus PQRS is 8cm and ∠PQR=120º then what is the length (in cm) of QS? 6 12 4 8 None 6. ABC is a triangle in which AB=AC. Let BC be produced to D. From a point E on the line AC let EF be a straight line such that EF is parallel to AB. Consider the quadrilateral ECDF thus formed. If ∠ABC=65º and ∠EFD=80º, then what is ∠FDC equal to? 45º 30º 35º 41º None 7. A square is drawn by joining the mid points of the given square a third square in the same way and this process continues indefinitely. If a side of the first square is 16 cm , then the sum of the area of all of the squares 256 sq. cm 128 sq. cm 1024 sq. cm 512 sq. cm None 8. The figure formed by joining the mid-points of the sides of a quadrilateral ABCD, taken in order, is a square only if, ABCD is a rhombus diagonals of ABCD are equal and perpendicular diagonals of ABCD are perpendicular. diagonals of ABCD are equal None 9. The mid point of the side of a triangle along with any of the vertices as the fourth point make a parallelogram of area= 1/4 ar(ABC) 1/2 ar(ABC) 1/3 ar(ABC) ar(ABC) None 10. Area of a quadrilateral ABCD is 20cm² and perpendiculars on BD from opposite vertices are 1 cm and 1.5 cm. The length of BD is 18 cm 16 cm 5 cm 4 cm None 11. If two adjacent angles of a parallelogram are in the ratio 2:3 , then the measure of angles are:72º,180º 96º,180º 36º,44º 80º,10º 72º,180º None 12. The three angles of a quadrilateral are 80º, 70º and 120º. The fourth angle is: 70º 90º 110º 100º None 13. If ABC is a triangle, right-angled at B and M,N are midpoints of AB and BC respectively, then what is 4(AN²+CM² ) equal to? 5AC² 4AC² 3AC² 6AC² None 14. Which of the following statements is INCORRECT ? A quadriiateral can have atmost three angles Each side of a quadrilateral is less than the sum of the renraining three sides Each diagonal of a quadrilateral divides it into two triangles. A quadrilateral has two diagonals. None 15. Which of the following statements is INCORRECT? Each side of a quadrilateral is less than the sum of the remaining three sides Each diagonal of a quadrilateral divides it into two triangles A quadrilateral has two diagonals A quadrilateral can have atmost three angles None 16. A,B,C,D are mid points of sides of parallelogram PQRS. If ar(PQRS)=36cm² then ar(ABCD) 36cm² 24cm² 18 cm² 30cm² None 17. The angles of a quadrilateral are in the ratio 1:2:3:4 . Then the smallest angle is: 142º 72º 18º 36º None 18. Let M, N, P and Q be mid points of the edges AB, CD, AC and BD respectively of the tetrahedron ABCD. Further, MN is perpendicular to both AN and CD and PQ is perpendicular to both AC and BD. Then which of the following is/are correct : AB = CD AC = BD BC = DA AN = BN None 19. If the area of quadrilateral ABCD is zero, then the four points A,B,C,D are collinear nothing can be said not collinear none of these None 20. Three angles of quadrilateral are 47º ,102º and 111º then the fourth angle is equal to: 260º 100º 360º 102º None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
