All Formulas of Class 9 from NCERT Book

As you are asking for All Formulas of Class 9 from NCERT Book but it is not possible to provide all Formulas on one place from one place , but I am providing stdy material which I have this time .

Formulas of Class 9 from NCERT Book
Geometry Shapes Formulas for Class 9

Geometric Figure Area Perimeter
Rectangle A=l w P=2(l+w)
Triangle A=12bh P=a+b+c
Trapezoid A = 12h(b1+b2) P=a+b+c+d
Parallelogram A=bh P=2(b+h)
Circle A=πr2 C=2πr
Algebraic Identities For Class 9

(a+b)2=a2+2ab+b2
(a−b)2=a2−2ab+b2
(a+b)(ab)=a2b2
(x+a)(x+b)=x2+(a+b)x+ab
(x+a)(xb)=x2+(ab)xab
(xa)(x+b)=x2+(ba)xab
(xa)(xb)=x2(a+b)x+ab
(a+b)3=a3+b3+3ab(a+b)
(ab)3=a3b33ab(ab)
(x+y+z)2=x2+y2+z2+2xy+2yz+2xz
(x+yz)2=x2+y2+z2+2xy2yz2xz
(xy+z)2=x2+y2+z22xy2yz+2xz
(xyz)2=x2+y2+z22xy+2yz2xz
x3+y3+z33xyz=(x+y+z)(x2+y2+z2xyyz−xz
x2+y2=12[(x+y)2+(xy)2]
(x+a)(x+b)(x+c)=x3+(a+b+c)x2+(ab+bc+ca)x+abc
x3+y3=(x+y)(x2xy+y2)
x3y3=(xy)(x2+xy+y2)
x2+y2+z2−xyyzzx=12[(x−y)2+(y−z)2+(z−x)2]<

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