Which topics are deleted in mathematics

I-NUMBER SYSTEMS REAL NUMBERS  Euclid’s division lemma UNIT II-ALGEBRA POLYNOMIALS  Statement and simple problems on division algorithm for polynomials with real coefficients. PAIR OF LINEAR EQUATIONS IN TWO VARIABLES  cross multiplication method QUADRATIC EQUATIONS Situational problems based on equations reducible to quadratic equations ARITHMETIC PROGRESSIONS Application in solving daily life problems based on sum to n terms UNIT III-COORDINATE GEOMETRY COORDINATE GEOMETRY  Area of a triangle. UNIT IV-GEOMETRY TRIANGLES Proof of the following theorems are deleted The ratio of the areas of two similar triangles is equal to the ratio of the squares of their corresponding sides.  In a triangle, if the square on one side is equal to sum of the squares on the other two sides, the angle opposite to the first side is a right angle. CIRCLES No deletion CONSTRUCTIONS  Construction of a triangle similar to a given triangle. UNIT V- TRIGONOMETRY INTRODUCTION TO TRIGONOMETRY  motivate the ratios whichever are defined at 0o and 90o TRIGONOMETRIC IDENTITIES Trigonometric ratios of complementary angles. HEIGHTS AND DISTANCES No deletion UNIT VI-MENSURATION AREAS RELATED TO CIRCLES  Problems on central angle of 120° SURFACE AREAS AND VOLUMES  Frustum of a cone. UNIT VI-STATISTICS & PROBABILITY STATISTICS  Step deviation Method for finding the mean  Cumulative Frequency graph PROBABILITY No deletion

Exercise - 1.1 Exercise - 2.3 Use of cross multiplication method in ch. 3 Q.3, 4, 8, 9, 10 of Exercise - 4.3 Q. 15 to Q. 20 of Exercise - 5.3 Theorem 6.6 and 6.9 Exercise- 7.3 Exercise - 8.3 Q. 2 to 7 of Exercise 11.1 Q. 7 of Exercise 12.2 and Q. 6 of Exercise 12.3 Exercise - 13.4 Exercise- 14.4 and use of step deviation method for finding mean

http://cbseacademic.nic.in/Revisedcurriculum_2021.html . Go on the above link and select Math u will get which topics r deleted.