Math formula in senior high school is a crucial knowledge point in math review of college entrance examination. In order to help senior three students review the mathematics of the college entrance examination. Let me share with you the math formula that must be memorized in high school. Welcome to reading.

Mathematical formula that must be memorized in senior high school: the solution of quadratic equation in one variable

-b+？ (b2-4ac)/2a-b-？ (b2-4ac)/2a

The relationship between root and coefficient x1+x2 =-b/ax1* x2 = c/a Note: Vieta theorem.

Discriminant b2-4a=0 Note: The equation has two equal real roots.

B2-4ac > Note: The equation has two unequal real roots.

B2-4ac & lt； 0 Note: The equation has multiple yokes.

Senior high school must recite mathematical formulas: formulas for three-dimensional graphics and plane graphics.

The standard equation of a circle (x-a)2+(y-b)2=r2 Note: (A, B) is the center coordinate.

General equation of circle x2+y2+Dx+Ey+F=0 Note: D2+E2-4f > 0

Parabolic standard equation y2 = 2 pxy 2 =-2 pxy 2 = 2 pxy 2 =-2py.

Lateral area of a straight prism S=c*h lateral area of an oblique prism s = c' * h.

Lateral area of a regular pyramid S= 1/2c*h' lateral area of a regular prism S= 1/2(c+c')h'

The lateral area of the frustum of a cone S = 1/2(c+c')l = pi(R+R)l The surface area of the ball S=4pi*r2.

Lateral area of cylinder S=c*h=2pi*h lateral area of cone s =1/2 * c * l = pi * r * l.

The arc length formula l=a*ra is the radian number r > of the central angle; 0 sector area formula s= 1/2*l*r

Conical volume formula V= 1/3*S*H Conical volume formula V= 1/3*pi*r2h

Oblique prism volume V=S'L Note: where s' is the straight cross-sectional area and l is the side length.

Cylinder volume formula V=s*h cylinder V=pi*r2h

Mathematical formulas that must be memorized in senior high school: formulas of figure perimeter, area and volume.

The circumference of a rectangle = (length+width)? 2

Perimeter of a square = side length? four

Area of rectangle = length? extensive

Area of a square = side length? Length of side

Area of triangle

Given that the base of a triangle is h, then S=ah/2.

Given the three sides A, B and C of a triangle and its half circumference P, then S=? [p(p-a)(p-b)(p-c)] (Helen formula) (p=(a+b+c)/2)

And: (a+b+c)*(a+b-c)* 1/4.

Given the angle c between two sides a and b of a triangle, S=absinC/2.

Let the three sides of a triangle be A, B and C respectively, and the radius of the inscribed circle be R.

Then the triangle area =(a+b+c)r/2.

Let the three sides of a triangle be A, B and C respectively, and the radius of the circumscribed circle be R.

Triangle area =abc/4r.