1. Lesson 1

1.6. Explore 2

Mathematics 20-2 M1 Lesson 1

Module 1: Trigonometry

 
Self-Check 1

 

Be sure to check your answers to ensure that you understand the solution process.

  1. Now that you have looked at a number of examples involving two right triangles, Gerard’s problem from the beginning of this lesson can be solved. Recall that he wants to determine the height of an office building. Using the two triangles Gerard drew, calculate the height of the office building.

    To view the solution, watch Gerard’s Solution.

     
    This is a screenshot for Gerard’s Solution.

textbook
  1. Complete “Practising” question 5 on page 161 of your textbook. Answer

  2. Complete “Practising” question 10 on page 168 of your textbook. Answer

notes organizer
In this lesson you learned about applying the Pythagorean theorem and the primary trigonometric ratios (SOH CAH TOA) to solve problems involving multiple triangles. If you haven’t done so already, update your notes organizer with any thoughts or key ideas about these types of problems. For instance, you might find it helpful to write down how SOH CAH TOA can help you remember the primary trigonometric ratios.