Question

what is the deleted portion of class 9 chapter 1 math???​

Answer 1

Answer:

DECUCTED PORTION

MATHEMATICS Code - 041

CLASS IX

CHAPTER TOPICS REMOVED

UNIT I-NUMBER SYSTEMS

REAL NUMBERS  Representation of terminating / non-terminating recurring

decimals on the number line through successive magnification.

 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.

UNIT II-ALGEBRA

POLYNOMIALS  Motivate and State the Remainder Theorem with examples.

Statement and proof of the Factor Theorem.

 x3+y3+z3

-3xyz

LINEAR EQUATIONS IN

TWO VARIABLES

 Examples, problems on Ratio and Proportion

UNIT III-COORDINATE GEOMETRY

COORDINATE

GEOMETRY

No deletion

UNIT IV-GEOMETRY

INTRODUCTION TO

EUCLID'S GEOMETRY

Delete the Chapter

LINES AND ANGLES No deletion

TRIANGLES  Proof of the theorem deleted- 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).

 Topic Deleted-Triangle inequalities and relation between ‘angle

and facing side' inequalities in triangles

QUADRILATERALS No deletion

AREA Delete the Chapter

CIRCLES  There is one and only one circle passing through three given

non-collinear points.

 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.

CONSTRUCTIONS  Construction of a triangle of given perimeter and base angles

UNIT V-MENSURATION

AREAS  Application of Heron’s Formula in finding the area of a

quadrilateral.

SURFACE AREAS AND

VOLUMES

No deletion

UNIT VI-STATISTICS & PROBABILITY

STATISTICS  Histograms (with varying base lengths),

 Frequency polygons.

 Mean, median and mode of ungrouped data.

PROBABILITY No deletion