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CBSE Class 9 Maths Question Paper in Gujrati - 2020 Herons Formula Practice Questions Class 9 Maths Important Questions for Class 9 Maths Chapter 8 Quadrilaterals Class 9 Linear Equations in Two Variables Solved Worksheet Maths Sample Paper for Class 9 - 2020 Probability Class 9 Maths Extra Questions Polynomials Class 9 Maths Extra Questions Constructions Class 9 Maths Extra Questions Coordinate Geometry Class 9 Extra Questions Number System Class 9 Maths Extra Questions Statistics Class 9 Maths Extra Questions Herons Formula Class 9 Extra Questions Linear Equations in Two Variables Class 9 Extra Questions Sample Paper for Class 9 Maths - SA1 2015 Surface Area and Volume Class 9 Maths Questions Construction Class 9 Maths Important Questions Area of Parallelogram and Triangles Class 9 Questions Questions on Rational Numbers For Class 9 Maths - 2019 Polynomials Class 9 Maths Important Questions Class 9 Maths Sample Question Paper - Periodic Test 2019 Lines and Angles, Parallel Lines and Triangles Class 9 Worksheet Coordinate Geometry and Heron's Formula Class 9 Worksheet - National Public School Maths Sample Papers for Class 9 of DPS Circles CBSE Class 9 Extra Questions with Solutions in PDF Statistics Class 9 Maths Questions and Answers

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Number Systems (8 Marks)

Algebra (17 Marks)

Coordinate Geometry (4 Marks)

Geometry (28 Marks)

Mensuration (13 Marks)

Statistics & Probability (10 Marks)

Chapter 1 : Real Numbers

Review of representation of natural numbers, integers and rational numbers on the number line. Representation of terminating / non-terminating recurring decimals on the number line through successive magnification. Rational numbers as recurring/ terminating decimals. Operations on real numbers.

Examples of non-recurring/non-terminating decimals. Existence of non-rational numbers (irrational numbers) such as √2, √3 and their representation on the number line. Explaining that every real number is represented by a unique point on the number line and conversely, viz. every point on the number line represents a unique real number.

Definition of nth root of a real number.

Rationalization (with precise meaning) of real numbers of the type 1/(a+b√x) and 1/(√x+√y) (and their combinations) where x and y are natural number and a and b are integers.

Recall of laws of exponents with integral powers. Rational exponents with positive real bases (to be done by particular cases, allowing learner to arrive at the general laws.)

Chapter 2 : Polynomials

Definition of a polynomial in one variable with examples and counter examples. Coefficients of a polynomial, terms of a polynomial and zeroes of polynomial. Degree of a polynomial. Constant, linear, quadratic and cubic polynomials. Monomials, binomials, trinomials. Factors and multiples. Zeroes of a polynomial. Motivate and State the Remainder Theorem with examples. Statement and proof of the Factor Theorem. Factorization of ax2 + bx + c, a ≠ 0 where a, b and c are real numbers, and of cubic polynomials using the Factor Theorem.

Recall of algebraic expressions and identities. Verification of identities:

(x + y + z)^{2} = x^{2} + y^{2} + z^{2} + 2xy + 2yz + 2zx, (x ± y)^{3} = x^{3} ± y^{3} ± 3xy (x ± y), x^{3} ± y^{3} = (x ± y) (x^{2} ± xy + y^{2}), x^{3} + y^{3} + z^{3} - 3xyz = (x + y + z) (x^{2} + y^{2} + z^{2} - xy - yz - zx)

Chapter 3: Coordinate Geometry

The Cartesian plane, coordinates of a point, names and terms associated with the coordinate plane, notations, plotting points in the plane.

Chapter 4: Linear Equations in Two Variables

Recall of linear equations in one variable. Introduction to the equation in two variables. Focus on linear equations of the type ax + by + c=0. Explain that a linear equation in two variables has infinitely many solutions and justify their being written as ordered pairs of real numbers, plotting them and showing that they lie on a line. Graph of linear equations in two variables. Examples, problems from real life, including problems on Ratio and Proportion and with algebraic and graphical solutions being done simultaneously.

Chapter 5: Introduction to Euclid's Geometry

History - Geometry in India and Euclid's geometry. Euclid's method of formalizing observed phenomenon into rigorous Mathematics with definitions, common/obvious notions, axioms/postulates and theorems. The five postulates of Euclid. Equivalent versions of the fifth postulate. Showing the relationship between axiom and theorem, for example:

(Axiom) 1. Given two distinct points, there exists one and only one line through them.

(Theorem) 2. (Prove) Two distinct lines cannot have more than one point in common.

Chapter 6: Lines and Angles

- (Motivate) If a ray stands on a line, then the sum of the two adjacent angles so formed is 1800and the converse.
- (Prove) If two lines intersect, vertically opposite angles are equal.
- (Motivate) Results on corresponding angles, alternate angles, interior angles when a transversal intersects two parallel lines.
- (Motivate) Lines which are parallel to a given line are parallel.
- (Prove) The sum of the angles of a triangle is 1800.
- (Motivate) If a side of a triangle is produced, the exterior angle so formed is equal to the sum of the two interior opposite angles.

Chapter 7: Triangles

- (Motivate) Two triangles are congruent if any two sides and the included angle of one triangle is equal to any two sides and the included angle of the other triangle (SAS Congruence).
- (Prove) Two triangles are congruent if any two angles and the included side of one triangle is equal to any two angles and the included side of the other triangle (ASA Congruence).
- (Motivate) Two triangles are congruent if the three sides of one triangle are equal to three sides of the other triangle (SSS Congruence).
- (Motivate) Two right triangles are congruent if the hypotenuse and a side of one triangle are equal (respectively) to the hypotenuse and a side of the other triangle. (RHS Congruence)
- (Prove) The angles opposite to equal sides of a triangle are equal.
- (Motivate) The sides opposite to equal angles of a triangle are equal.
- (Motivate) Triangle inequalities and relation between ‘angle and facing side' inequalities in triangles.

Chapter 12: Heron’s Formula

Area of a triangle using Heron's formula (without proof) and its application in finding the area of a quadrilateral.

Chapter 14: Statistics

Introduction to Statistics: Collection of data, presentation of data — tabular form, ungrouped / grouped, bar graphs, histograms (with varying base lengths), frequency polygons, Mean, median and mode of ungrouped data.

Chapter 15: Probability

History, repeated experiments and observed frequency approach to probability. Focus is on empirical probability. (A large amount of time to be devoted to group and to individual activities to motivate the concept; the experiments to be drawn from real - life situations, and from examples used in the chapter on statistics).

Chapter 8: Quadrilaterals

- (Prove) The diagonal divides a parallelogram into two congruent triangles.
- (Motivate) In a parallelogram opposite sides are equal, and conversely.
- (Motivate) In a parallelogram opposite angles are equal, and conversely.
- (Motivate) A quadrilateral is a parallelogram if a pair of its opposite sides is parallel and equal.
- (Motivate) In a parallelogram, the diagonals bisect each other and conversely.
- (Motivate) In a triangle, the line segment joining the mid points of any two sides is parallel to the third side and is half of it and (motivate) its converse.

Chapter 9: Area of Parallelogram and Triangles

Review concept of Area, Recall area of a rectangle.

- (Prove) Parallelograms on the same base and between the same parallels have the equal area.
- (Motivate) Triangles on the same base (or equal base) and between the same parallels are equal in area.

Chapter 10: Circles

Through examples, arrive at definition of circle and related concepts-radius, circumference, diameter, chord, arc, secant, sector, segment, subtended angle.

- (Prove) Equal chords of a circle subtend equal angles at the centre and (motivate) its converse.
- (Motivate) The perpendicular from the centre of a circle to a chord bisects the chord and conversely, the line drawn through the centre of a circle to bisect a chord is perpendicular to the chord.
- (Motivate) There is one and only one circle passing through three given non-collinear points.
- (Motivate) Equal chords of a circle (or of congruent circles) are equidistant from the centre (or their respective centre) and conversely.
- (Prove) The angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle.
- (Motivate) Angles in the same segment of a circle are equal.
- (Motivate) If a line segment joining two points subtends equal angle at two other points lying on the same side of the line containing the segment, the four points lie on a circle.
- (Motivate) The sum of either of the pair of the opposite angles of a cyclic quadrilateral is 180° and its converse.

Chapter 11: Constructions

Construction of bisectors of line segments and angles of measure 60o, 90o, 45o etc., equilateral triangles.

Construction of a triangle given its base, sum/difference of the other two sides and one base angle. Construction of a triangle of given perimeter and base angles.

Chapter 13: Surface Areas and Volumes

Surface areas and volumes of cubes, cuboids, spheres (including hemispheres) and right circular cylinders/cones.

Suggested Mathematics Question Paper Design - Class 9

Typology of Questions

**Remembering:** Exhibit memory of previously learned material by recalling facts, terms, basic concepts, and answers.

Number of Questions Asked that are Objective type Questions = 6

Number of Questions Asked that are Short Answer Type Questions = 4

Number of Questions Asked that are Long Answer Type Questions = 1

Total Marks = 20

Total Weightage = 25%

Typology of Questions

**Understanding:** Demonstrate understanding of facts and ideas by organizing, comparing, translating, interpreting, giving descriptions and stating main ideas

Number of Questions Asked that are Objective type Questions = 6

Number of Questions Asked that are Short Answer Type Questions = 2

Number of Questions Asked that are Long Answer Type Questions = 3

Total Marks = 23

Total Weightage = 29%

Typology of Questions

**Applying:** Solve problems to new situations by applying acquired knowledge, facts, techniques and rules in a different way.

Number of Questions Asked that are Objective type Questions = 5

Number of Questions Asked that are Short Answer Type Questions = 4

Number of Questions Asked that are Long Answer Type Questions = 1

Total Marks = 19

Total Weightage = 24%

Typology of Questions

**Analysing:** Examine and break information into parts by identifying motives or causes. Make inferences and find evidence to support generalizations

**Evaluating:** Present and defend opinions by making judgments about information, validity of ideas, or quality of work based on a set of criteria.

**Creating:** Compile information together in a different way by combining elements in a new pattern or proposing alternative solutions

Number of Questions Asked that are Objective type Questions = 3

Number of Questions Asked that are Short Answer Type Questions = 4

Number of Questions Asked that are Long Answer Type Questions = 1

Total Marks = 18

Total Weightage = 22%

Internal Assessmen = 20 Marks

Pen Paper Test and Multiple Assessment (5+5) = 10 Marks

Portfolio = 5 Marks

Lab Practical (Lab activities to be done from the prescribed books) = 5 Marks

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