CBSE Class 9 Mathematics Latest Syllabus for 2015

Scroll down to download pdf file

Maths Course Structure - Class IX

 

UNITS

 

MARKS

I

NUMBER SYSTEMS

06

II

ALGEBRA

20

III

COORDINATE GEOMETRY

06

IV

GEOMETRY

22

V

MENSURATION

14

VI

STATISTICS AND PROBABILITY

12

 

TOTAL

80

 

UNIT I : NUMBER SYSTEMS

(20) Periods

 

1. REAL NUMBERS

 

 

Review of representation of natural numbers, integers, 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.

 

 

Examples of nonrecurring / non terminating decimals such as v2, v3, v5 etc. Existence of non-rational numbers (irrational numbers) such as v2, v3 and their representation on the number line.

 

 

Explaining that every real number is represented by a unique point on the number line and conversely, every point on the number line represents a unique real number.

 

 

Existence of vx for a given positive real number x (visual proof to be emphasized).

 

 

Definition of nth root of a real number.

 

 

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.)

 

 

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

 

 

 

 

 

UNIT II : ALGEBRA

 

 

1. POLYNOMIALS

(25) Periods

 

Definition of a polynomial in one variable, its coefficients, with examples and counter examples, its terms, zero polynomial. Degree of a polynomial. Constant, linear, quadratic, cubic polynomials; monomials, binomials, trinomials. Factors and multiples. Zeros/roots of a polynomial / equation. State and motivate the Remainder Theorem with examples and analogy to integers. Statement and proof of the Factor Theorem. Factorization

 

 

of ax2 + bx + c, a1 0 where a, b, c are real numbers, and of cubic polynomials using the Factor Theorem.

 

 

Recall of algebraic expressions and identities. Further identities of the type (x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2zx, (x y)3 = x3 y3 3xy (x y).

 

 

x3 + y3 + z3 - 3xyz = (x + y + z) (x2 + y2 + z2-xy - yz - zx) and their use in factorization of. polymonials. Simple
expressions reducible to these polynomials.

 

 

2.LINEAR EQUATIONS IN TWO VARIABLES

(12) Periods

 

Recall of linear equations in one variable. Introduction to the equation in two variables. Prove 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 seem to lie on a line. Examples, problems from real life, including problems on Ratio and Proportion and with algebraic and graphical solutions being done simultaneously.

 

 

UNIT III : COORDINATE GEOMETRY

 

 

1.COORDINATE GEOMETRY

(9) Periods

 

The Cartesian plane, coordinates of a point, names and terms associated with the coordinate
plane, notations, plotting points in the plane, graph of linear equations as examples; focus on linear equations of the type ax + by + c = 0 by writing it as y = mx + c and linking with the chapter on linear equations in two variables.

 

 

UNIT IV : GEOMETRY

 

 

1. INTRODUCTION TO EUCLID'S GEOMETRY

(6) Periods

 

History - Euclid and geometry in India. 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.

 

 

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

 

 

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

 

 

2. LINES AND ANGLES

(10) Periods

 

1. (Motivate) If a ray stands on a line, then the sum of the two adjacent angles so formed is 180o and the converse.

 

 

2. (Prove) If two lines intersect, the vertically opposite angles are equal.

 

 

3. (Motivate) Results on corresponding angles, alternate angles, interior angles when a transversal intersects two parallel lines.

 

 

4. (Motivate) Lines, which are parallel to a given line, are parallel.

 

 

5. (Prove) The sum of the angles of a triangle is 180o.

 

 

6. (Motivate) If a side of a triangle is produced, the exterior angle so formed is equal to the sum of the two interiors opposite angles.

 

 

3. TRIANGLES

(20) Periods

 

1. (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).

 

 

2. (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).

 

 

3. (Motivate) Two triangles are congruent if the three sides of one triangle are equal to three sides of the other triangle (SSS Congruene).

 

 

4. (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.

 

 

5. (Prove) The angles opposite to equal sides of a triangle are equal.

 

 

6. (Motivate) The sides opposite to equal angles of a triangle are equal.

 

 

7. (Motivate) Triangle inequalities and relation between 'angle and facing side' inequalities in triangles.

 

 

4. QUADRILATERALS

(10) Periods

 

1. (Prove) The diagonal divides a parallelogram into two congruent triangles.

 

 

2. (Motivate) In a parallelogram opposite sides are equal, and conversely.

 

 

3. (Motivate) In a parallelogram opposite angles are equal, and conversely.

 

 

4. (Motivate) A quadrilateral is a parallelogram if a pair of its opposite sides is parallel and equal.

 

 

5. (Motivate) In a parallelogram, the diagonals bisect each other and conversely.

 

 

6. (Motivate) In a triangle, the line segment joining the mid points of any two sides is parallel to the third side and (motivate) its converse.

 

 

5. AREA

 

 

Review concept of area, recall area of a rectangle.

 

 

1. (Prove) Parallelograms on the same base and between the same parallels have the same area.

 

 

2. (Motivate) Triangles on the same base and between the same parallels are equal in area and its converse.

 

 

6. CIRCLES

(15) Periods

 

Through examples, arrive at definitions of circle related concepts, radius, circumference, diameter, chord, arc, subtended angle.

 

 

1. (Prove) Equal chords of a circle subtend equal angles at the center and (motivate) its converse.

 

 

2. (Motivate) The perpendicular from the center of a circle to a chord bisects the chord and conversely, the line drawn through the center of a circle to bisect a chord is perpendicular to the chord.

 

 

3. (Motivate) There is one and only one circle passing through three given non-collinear points.

 

 

4. (Motivate) Equal chords of a circle (or of congruent circles) are equidistant from the center(s) and conversely.

 

 

5. (Prove) The angle subtended by an arc at the center is double the angle subtended by it at any point on the remaining part of the circle.

 

 

6. (Motivate) Angles in the same segment of a circle are equal.

 

 

7. (Motivate) If a line segment joining two points subtendes equal angle at two other points lying on the same side of the line containing the segment, the four points lie on a circle.

 

 

8. (Motivate) The sum of the either pair of the opposite angles of a cyclic quadrilateral is 180o and its converse

 

 

7. CONSTRUCTIONS

(10) Periods

 

1. Construction of bisectors of line segments & angles, 60o, 90o, 45o angles etc., equilateral triangles.

 

 

2. Construction of a trangle given its base, sum/difference of the other two sides and one base angle.

 

 

3. Construction of a triangle of given perimeter and base angles.

 

 

UNIT V :MENSURATION

 

 

1.AREAS

(4) Periods

 

Area of a triangle using Heros formula(without proof) and its application in finding the area of a quadrilateral

 

 

2.SURFACE AREAS AND VOLUMES

(10) Periods

 

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

 

 

UNIT VI : STATISTICS AND PROBABILITY

 

 

1.STATISTICS

(13) Periods

 

Introduction to statistics: Collection of data, Presentation of data- tabular form, ungrouped / grouped, bar graphs, histograms(with varying base lengths), frequency polygons,
qualitative analysis of data to choose the correct form of presentation for the
collected data. Mean, median, mode of ungrouped data.

 

 

2.PROBABILITY

(12) Periods

 

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

 

 

 

 

 

INTERNAL ASSESSMENT

20 MARKS

Evaluation of activities

10 Marks

Project Work

05 Marks

Continuous Evaluation

05 Marks

 

Click on the text For more study material for Class IX please click here - Class IX

Latest CBSE News

  • When it comes to scoring good marks in the board exams, most of the students waste their time to choosing the right study material. Sometimes it may lead to failure because of the wrong study material. National Education, Research and Training Council (NCERT) have been responsible for distributing the textbooks to students and for their development. NCERT books are very helpful to understand the...
  • Board exams play a very important role in our lives. It boosts our knowledge and also helps to know our status in academic life. Both class 10th and class 12th play a very significant role in a student’s life.It also helps inselecting the stream of their own choice. So that in later, they can’t regret their decisions. Board exams are key factors in determining the course of student’s careers....
  • So far, the practical examinations of students appearing for the Central Board of Secondary Education (CBSE) were held at home centres, but from now on this year, plans like conducting practical exams at the external centres just like the board, theory paper is conducting. As per the latest CBSE updates, the CBSE will bring new changes in the marking system of practical examinations, and it is...
  • We all know CBSE has conducted every year board exams for class 10. As soon as we land in class 10, everyone starts suggesting different things. They tell us to study hard because this is the first step towards your career. If you are willing to take science stream in class 11th and 12th, then it is very important to get good marks in class 10. So that you can easily take your stream. Check out...
  • Last month Delhi government announced that the students of government schools will not be charged any fees to the Central Bureau of Secondary Education (CBSE). Well, Delhi Education Minister Manish Sisodia said this while addressing students during a function at the Thyagraj Stadium in New Delhi. All the Delhi government schools are affiliated to the CBSE as a board of education. As the Sisodia...
  • “Education is what remains after one has forgotten what one has learned in school”-AlbertEinstein The statement is indeed true but doesn’t mistake it to be limited to academic education. It clearly implies both types of education-Academic and Non-Academic. Academic education nurtures the brain with the study related knowledge but non-academic helps to recognize the skills one possesses and...
  • As it is the beginning of a new school year, every 11th class CBSE passed student is eager and making plans on how to score the best in their class 12th CBSE boards. It definitely is a good start to reach their goal of scoring 90+ percentages in the exams. Students who have opted for the science stream often get very stressed upon how they are going to perform, let me tell you something…scoring a...