It's not just any circle—it's the unit circle. The fourth lesson in the series is an introduction to the famous unit circle. While working through a series of activities, young scholars learn the components of the unit circle and how to apply them in the fourth of five installments. The lesson builds from using reference angles to locate points on the circle to solving basic trigonometric equations.

Concepts

unit circle, trigonometric, trigonometric ratios, reference angle, trigonometric equations

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Additional Tags

math

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Instructional Ideas

• Follow each activity with whiteboard practice to check for understanding before continuing
• Have pupils complete the activities in pairs; allow them to work through difficulties independently or with minimal guidance

Classroom Considerations

• Learners should be proficient in finding right triangle trigonometric ratios

Pros

• Scaffolds concepts to build new ones from prior knowledge
• Provides multiple examples with many opportunities for practice

Cons

• None

Common Core

HSF-TF.A.1 HSF-TF.A.2