Trigonometry
Trigonometry is a building block of mathematics. Before tackling harder problems, mathematicians make sure the foundations are solid — and that is exactly what this lesson does. We start with the ideas you already know and connect them to trigonometry step by step.
The key to trigonometry is understanding why each step works, not just memorising rules. When you work through an example, ask yourself: what changed at each step, and why was that allowed? This habit turns procedures into real understanding.
You use trigonometry more often than you might think — in shopping, cooking, sports statistics and planning trips across Canada. By the end of this lesson you will be able to explain trigonometry in your own words and apply it to everyday problems.
Learning goals
- Explain the key ideas of trigonometry in your own words
- Apply trigonometry skills to everyday Canadian examples
- Reflect on what you learned and set a next step
Learning together
Warm-up (10 min)
Mental-math warm-up: three quick questions that review the skills trigonometry builds on. Discuss strategies aloud.
Teach (20 min)
Introduce the key idea of trigonometry with one worked example on paper or a whiteboard. Think aloud through each step, then do a second example together.
Guided practice (15 min)
Learner tries two trigonometry problems with support. Ask "what comes next?" rather than giving answers.
Independent practice (10 min)
Learner completes the practice problems in Section B of the worksheet alone.
Wrap-up (5 min)
Exit question: "Explain trigonometry to me in one sentence." Note anything to review next lesson.
Reflection quiz only; it does not certify topic mastery. Results are not saved.
Next lesson: Functions (Gr. 11)