Huanggang Difficult Points Course Practice -- Grade 9 Math (First Semester)

Author: Hu Mingying, Editor-in-Chief
Publisher:
Publish Date: 2004-06-01
Features:
Algebra Part
Preface to Algebra
Chapter 12: Quadratic Equations
Section 1: Quadratic Equations
Section 2: Solving Quadratic Equations by Factoring
Section 3: The Discriminant of a Quadratic Equation
Section 4: The Relationship Between the Roots and Coefficients of a Quadratic Equation
Section 5: Factoring Quadratic Trinomials
Section 6: Applications of Quadratic Equations
Section 7: Fractional Equations That Can Be Reduced to Quadratic Equations
Section 8: Simple Systems of Quadratic Equations in Two Variables
Section 9: Applications of Equations and Systems of Equations
Unit Test
Geometry Part
Chapter 6: Solving Right Triangles
Section 1: Sine and Cosine
Section 2: Tangent and Cotangent
Section 3: Using a Calculator to Find Acute Angle Trigonometric Functions and Finding Acute Angles from Their Values
Section 4: Solving Right Triangles
Section 5: Examples of Applications
Section 6: Practical Work
Unit Test
Chapter 7: Circles
Section 1: Circles
Section 2: Circles Through Three Points
Section 3: Diameters Perpendicular to Chords
Section 4: Relationships Between Central Angles, Arcs, Chords, and Chord Distances
Section 5: Inscribed Angles
Section 6: Cyclic Quadrilaterals
Section 7: The Position Relationship Between a Line and a Circle
Section 8: Determination and Properties of Tangents
Section 9: Incircles of Triangles
Section 10: The Tangent Length Theorem
Section 11: Angles Between a Chord and a Tangent
Section 12: Proportional Line Segments Related to Circles
Unit Test
Final Test
Reference Answers