What mathematical formulas are there in junior high school?

1, parabolic standard equation y2 = 2pxy2 =-2pxy2 = 2pxy2 =-2pxy.

2. The side area of right-angle prism is s = c * h..

3. The side area of the oblique prism s = c' * h.

4. The side area of a regular pyramid is S= 1/2c*h'

5. The side area of prism S = 1/2(c+c')h'

6. The side area of the frustum of a cone is s =1/2 (c+c') l = pi (r+r) l.

7. The surface area of the ball S=4pi*r2.

8. The side area of the cylinder is s = c * h = 2pi * h.

9. The cone lateral area s =1/2 * c * l = pi * r * l.

10, sector area formula s =1/2 * l * r.

1 1, cone volume formula v =1/3 * s * h.

12, square difference formula: a2-b2=(a+b)(a-b).

13, complete square formula: a2+2ab+b2=(a+b)2.

14, cubic sum formula: a3+b3=(a+b)(a2-ab+b2).

15, cubic difference formula: a3-b3=(a-b)(a2+ab+b2).

16, complete cubic sum formula: a3+3a2b+3ab2+b3=(a+b)3.

17, complete cubic difference formula: a3-3a2b+3ab2-b3=(a-b)3.

18, three complete square formulas: a2+b2+c2+2ab+2bc+2ac=(a+b+c)2.

19, cubic sum formula: a3+B3+C3-3abc = (a+b+c) (a2+B2+C2-ab-BC-AC).

20. Rectangular area = length x width S = ab.

2 1, square area = side length × side length S = a2

22. The area of triangle = base × height ÷2 S=ah÷2.

23. parallelogram area = bottom x height S=ah.