icse | class-9 | selina book | maths | ch-21| solids | ex-21(A)| part-1

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(All Chapters--Playlist)

Ch-1(RATIONAL AND IRRATIONAL NUMBERS)

Chapter-2(Compound interest- without using formula)

Chapter-3(Compound interest- using formula)

Ch-4(Expansions)

Ch-5(Factorisation)

Ch-6(Simultaneous Equations)

Ch-7(Indices)

Ch-8(Logarithms)

Ch-9(Congruency in Triangles)

Ch-10(Isosceles Triangles)

Ch-11(Inequalities)

Ch-12(Mid-point Theorem and its converse)

Ch-13(Pythagoras Theorem)

Ch-14(Rectilinear Figures)

Ch-15(Construction of Polygons)

Ch-16(Area Theorems)

Ch-17(Circle)

Ch-18(Statistics)

Ch-19(Mean and Median)

Ch-20(Area and perimeter of plane Figures)

Ch-21(Solids-surface area and volume of 3-D solids)

Ch-22(Trigonometrical Ratios)

Ch-23(Trigonometrical ratios of standard angles)

Ch-24(Solution of Right Triangles)

Ch-25(Complementary Angles)

Ch-26(Co-ordinate Geometry)

Cl-9th Ch-27(Graphical Solution):

Ch-28(Distance formula )

**************For Class-10th****************


Ch-1(GST)--Playlist

Ch-2(Banking) New lecture-playlist


Ch-3(Shares and Dividends)

Ch-4(linear inequations)

Ch-5(Quadratic Equation)

Ch-6(Solving Problems)

Ch-7(Ratio and Proportion)

Ch-8(Remainder and Factor Theorems)

Ch-9(Matrices)

Ch-10(A.P)

Ch-11(G.P)

Ch-12(Reflection)

#PROBLEMS_BEATER#ICSE#CH-21#problems_beater

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[Agrikauttam-fq]

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[flyhigh]

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Why you are not using 2[lb+bh+hl]
If anyone else know the ans: please let me know .

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[shubhkaushik]

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