1, arithmetic progression formula: a general formula for finding arithmetic progression, where the tolerance d refers to the difference between two adjacent terms, and the first term is the first term in the exponential series a 1.
2. Pythagorean theorem: In a right triangle, the square on the right is equal to the sum of the squares of the other two sides, that is, a? +b？ =c？ , where a and b are right angles and c is hypotenuse.
3. Plane geometry formulas: including point-to-line distance formula, point-to-plane distance formula, two-point distance formula, line segment midpoint formula, area formula, circumference formula, etc.
4. formulas of trigonometric functions: including the definition, properties and identity transformation of sine, cosine and tangent functions, such as sin(a+b)=sinacosb+cosasinb, etc.
5. Theorems of circle properties: including central angle, relation theorem between arc and chord, circumferential angle theorem and tangent angle theorem.
6. Parabolic Theorem: Including the property theorems such as focus, directrix and eccentricity of parabola.
7. Algebraic formula: including factorization, root finding and multiplication of polynomials.
8. Equation solving methods: including the solving methods of linear equations with one variable, quadratic equations with one variable and linear equations with two variables.
9. Relationship between function and image: It includes the corresponding relationship between function and image. For example, the image with linear function y=kx+b is a straight line.
1, the two acute angles of a right triangle are complementary.
2. The outer angle of a triangle is equal to the sum of two non-adjacent inner angles.
3. The outer angle of a triangle is greater than any inner angle that is not adjacent to it.
4. The corresponding sides and angles of congruent triangles are equal.
5. Edge Axiom (SAS): Two triangles with identical angles between two sides.
6. Axiom of Corner (ASA): Two triangles with two corners and their corresponding edges are congruent.
7. Inference (AAS): There are two angles, and the opposite side of one angle corresponds to the congruence of two triangles.
8. Edge axiom (SSS): congruence of two triangles with three corresponding equilateral sides.