# Assignments For Class 9 Mathematics Quadrilaterals

#### Key Concepts for Class 9 Mathematics Quadrilaterals

(1) Sum of the angles of a quadrilateral is 3600.
(2) A diagonals of a parallelogram divides it into two congruent triangles.
(3) In a parallelogram
(a) diagonals bisects each other.
(b) opposite angles are equal.
(c) opposite sides are equal
(4) Diagonals of a square bisects each other at right angles and are equal, and vice-versa.
(5) A line through the mid-point of a side of a triangle parallel to another side bisects the third side. (Mid point theorem)
(6) The line through the mid points of sides of a Δ ║ to third side and half of it.

Question. The figures obtained by joining the mid-points of the sides of a rhombus, taken in order, is
(a) a square
(b) a rhombus
(c) a parallelogram
(d) a rectangle

Ans.

a rectangle

Question. In the adjoining figure QR=RS
Find ∠PSR

Ans.

∠PSR = 1050

Question. In a square ABCD, the diagonals AC and BD bisect at 0. Then Δ AOB is
(a) acute angled
(b) right angled
(c) obtuse angled
(d) equilateral

Ans.

right angled

Question. Three angles of a quadrilateral are 600, 700 and 800. The fourth angle is
(a) 1500
(b) 1600
(c) 1400
(d) None of these

Ans.

1500

Question. ABCD is a rhombus such that ∠ACB = 400 then ∠ADB is
(a) 400
(b) 450
(c) 500
(d) 600

Ans.

500

Question. The diagonals AC and BD of a parallelogram ABCD intersect each other at the point O, if ∠DAC = 320 and ∠AOB = 720 then is
(a) 320
(b) 240
(c) 400
(d) 630

Ans.

400

Question. A quadrilateral ABCD is a parallelogram if
(b) AB = CD
(d) ∠A = 600, ∠C = 600, ∠B = 1200

Ans.

∠A = 600, ∠C = 600, ∠B = 1200

## Assignments for Class 9 Mathematics Quadrilaterals as per CBSE NCERT pattern

1. Solving Assignments for Mathematics Quadrilaterals Class 9 helps to further enhance understanding of the topics given in your text book which will help you to get better marks
2. By solving one assignments given in your class by Mathematics Quadrilaterals teacher for class 9 will help you to keep in touch with the topic thus reducing dependence on last minute studies
3. You will be able to understand the type of questions which are expected in your Mathematics Quadrilaterals class test
4. You will be able to revise all topics given in the ebook for Class 9 Mathematics Quadrilaterals as all questions have been provided in the question banks
6. Parents will be able to take print out of the assignments and give to their child easily.

All free Printable practice assignments are in PDF single lick download format and have been prepared by Class 9 Mathematics Quadrilaterals teachers after full study of all topics which have been given in each chapter so that the students are able to take complete benefit from the worksheets. The Chapter wise question bank and revision assignments can be accessed free and anywhere. Go ahead and click on the links above to download free CBSE Class 9 Mathematics Quadrilaterals Assignments PDF.

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