math · Grade 10 · Geometry
Choose Trigonometric Ratios
Relate sides to a chosen acute angle and use trigonometric ratios.
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Explore the related learning targets, foundations and possible next connections.
Learning goals
- Relate sides to a chosen acute angle and use trigonometric ratios.
Before you begin
Understand the words and representations introduced in the Explore activity.
Age and grade do not measure readiness. Adjust reading or adult support to preserve the intended learning goal.
Follow the sequence
Complete practice
Practice previewChoose Trigonometric Ratios
Practice · Independent · 25 min
Relate sides to a chosen acute angle and use trigonometric ratios. A complete set with exploration, practice and application. Use the linked unit for the learning sequence and teaching guide.
1. Explore
Practice previewChoose Trigonometric Ratios: Explore and Explain
Explore · Independent · 10 min
Relate sides to a chosen acute angle and use trigonometric ratios. A focused learn activity. Use the linked unit for the learning sequence and teaching guide.
2. Practice
Practice previewChoose Trigonometric Ratios: Practice Independently
Practice · Independent · 10 min
Relate sides to a chosen acute angle and use trigonometric ratios. A focused practice activity. Use the linked unit for the learning sequence and teaching guide.
3. Apply
Practice previewChoose Trigonometric Ratios: Apply and Create
Apply · Independent · 15 min
Relate sides to a chosen acute angle and use trigonometric ratios. A focused apply activity. Use the linked unit for the learning sequence and teaching guide.
Download the unit pack
Numbered activities, separate answer keys and a teaching guide in one ZIP. The pack uses the focused sequence; the complete practice sheet above is an alternative.
Teaching and response guide
- Begin with: Find sin A.
- Connect the response to: Find tan A.
- Ask students to apply the idea: For the other acute angle, what is the sine ratio in the 3 4 5 triangle?
Watch for: Accepting an answer without checking whether it uses the material and satisfies the requested relationship or criteria.
Check the answer criteria for each task. A supported explanation may have more than one acceptable response. These activities offer evidence to discuss; completing a sheet alone does not establish mastery.