# Alignment: Ethiopia • Mathematics • Student Textbook • Grade 9

• Unit 1 The Number System
• 1.1 Revision on the Set of Rational Numbers
• 1.2 The Real Number System
• Unit 2 Solutions of Equations
• 2.1 Equations Involving Exponents and Radicals
• 2.2 Systems of Linear Equations in Two Variables
• 2.3 Equations Involving Absolute Value
• Unit 3 Further on Sets
• 3.1 Ways to Describe Sets
• 3.2 The Notation of Sets
• 3.3 Operations on Sets
• Unit 4 Relations and Functions
• 4.1 Relations
• 4.2 Functions
• 4.3 Graphs of Functions
• Unit 5 Geometry and Measurement
• 5.1 Regular Polygons
• 5.2 Further on Congruency and Similarity
• 5.3 Further on Trigonometry
• 5.4 Circles
• 5.5 Measurement
• Unit 6 Statistics and Probability
• 6.1 Statistical Data
• 6.2 Probability
• Unit 7 Vectors in Two Dimensions
• 7.1 Introduction to Vectors and Scalars
• 7.2 Representation of a Vector
• 7.3 Addition and Subtraction of Vectors and Multiplication of a Vector by a Scalar
• 7.4 Position Vector of a Point

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