The mathematical formula of the first volume of Grade Two is as follows: 1. The side area of a right prism is s = c * h.
Second, the regular pyramid lateral area s =1/2c * h.
Third, the prism side area s =1/2 (c+c) h.
Fourthly, the side area of frustum of a cone is s =1/2 (c+c) l = pi (r+r) l.
Five, the surface area of the ball S=4pi*r2.
Six, the cylindrical side area s = c * h = 2pi * h.
Seven, cone lateral area s =1/2 * c * l = pi * r * l.
Eight, the arc length formula l=a*ra is the radian number r > of the central angle; 0
Nine. Sector area formula s =1/2 * l * r.
X. Cone volume formula V= 1/3*S*H
XI。 Cone volume formula V= 1/3*pi*r2h
The mathematical formula in the first volume of the second day of junior high school must be memorized. First, the law of multiplication:
Multiplication rule of monomial: multiply the monomial, multiply the coefficient and the same base respectively as the' factor' of the product; For letters contained only in monomials, their exponents are regarded as factors of products.
Multiplication rule of monomial and polynomial: multiply monomial and polynomial respectively, and then add the products.
Polynomial and Polynomial Multiplication Rule: Polynomial multiplication, first multiply each term of one polynomial with each term of another polynomial, and then add the products.
Second, the law of division:
Single division rule: single division, division coefficient and the same base number are respectively used as factors of quotient; For the letter only contained in the division formula, it is used as the factor of quotient together with its index.
The rule of polynomial divided by monomial: polynomial divided by monomial, first divide each term of this polynomial by this monomial, and then add the obtained quotients.
Third, the multiplication formula:
① Square difference formula: (a+b) (a-b) = A2-B2
Written language statement: the sum of two numbers multiplied by the difference between these two numbers is equal to the square difference between these two numbers. ② Complete square formula: (a+b) 2 = A2+2ab+B2 (a-b) 2 = A2-2ab+B2.
Written language statement: the square of the sum (or difference) of two numbers is equal to twice the sum of the squares of these two numbers plus (or minus) the product of these two numbers.