Welcome to the exciting world of geometry! Ahead of you lie many exciting discoveries that will help you learn more about the world. Geometry is used in many areas—from art to science. For example, geometry plays a key role in construction, fashion design, architecture, and computer graphics. This course focuses on the main ideas of geometry that are the foundation of applications of geometry used everywhere. In this chapter, you’ll study the basic elements of geometry. Later you will prove things about geometric shapes using the vocabulary and ideas in this chapter—so make sure that you completely understand each of the concepts presented here before moving on.

Main chapters:

• Basics of Geometry
• Reasoning and Proof
• Parallel and Perpendicular Lines
• Congruent Triangles
• Relationships Within Triangles
• Quadrilaterals
• Similarity
• Right Triangle Trigonometry
• Circles
• Perimeter and Area
• Surface Area and Volume
• Transformations