What do you create when you rotate a ray? An angle! Teach all the angle basics including naming, measuring, supplements, and complements. 

Concepts

adjacent angles, vertical angles, supplementary angles, complementary angles, angle measurement

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Additional Tags

math

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Instructional Ideas

• Provide a graphic organizer, such as a waffle, to record vocabulary and examples
• Use images and examples to develop a lesson presentation

Classroom Considerations

• Lesson may take more or less time depending on the strength of your classes
• The lesson begins a 16-part geometry series

Pros

• Strong focus on vocabulary, helping lay a good foundation for future concepts

Cons

• Practice problems do not incorporate all concepts taught in the lesson
• Missing application and problems with context

Common Core

HSG-CO.A.1