Question

write any 20 formula in math of 8 class

Answer 1

There are many formulae in math's. I can't provide you all but some formulas by me....

1...Area of circle = π r^2
2...Perimeter = sum of all sides
3...Area of of square = ( side ) ^ 2
4...Area of triangle = 1/2 × base × height
5...Lenght of a rectangle = area / breadth
6...Breadth of a rectangle = area / Lenght
7...Height of a triangle = 2 × AREA / BASE
8...base of a triangle = 2 × area / height
9...Area of rhombus = 1/2 × product of diagonals
10... 1 m = 100 cm
11... 1 m^ 2 = 10,000 cm^2
12... 1m = 10 dm
13.... 1 m^2 = 100 dm^2
14... 1 m^ 2 = 10,00,000 mm^2
15... 1 dam = 10 m
16... 1 dam^2 = 100 m^2
17... 1 dm^2 = 10,000 m^2
18... 1 dm^2 = 100 cm^2
19... 1 dm = 10 cm
20... 1 cm = 10 mm
21... 1 cm^2 = 100 m^2
22... perimeter = 4a
23... area = a^2
24... area = (perimeter/4)^2
25... diagonal = √2a
26... area = 1/2 (diagonal)^2

Answer 2

1. (a+b) (a-b) = a square - b square
2.a square - b square = (a+b) (a-b)
3.a square +b square (a+b) square -2ab
4.(a+b) square = (a-b) square + 4ab
5. a square + b square =(a-b) square +2ab
6. (a-b) square - 4ab
7.(a-b) square = a square -2ab + b square
8.(a+b+c)square =a square + b square + c square +2ab+ 2bc + 2 ca
9.(x+a) (x+b)= x square + (a+b)x +ab
10.a square + 2ab + b square = (a+b) square
11.a square - 2 ab + b square = (a-b) square
12.a square - b square = (a+b) (a-b)


Next Of The formula I will give after wards