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Math 10C Module 1 Lesson 7

Module 1 Part 2: Trigonometry

 

Lesson 8: Using Trigonometry to Find Missing Sides

** Always have your calculator in degree mode. Check by hitting the MODE button and looking at the third line. The word degree must be darkened**

 

The Leaning Tower of Pisa in Italy is a freestanding bell tower in the Italian city of Pisa and is known worldwide for its unintended tilt to one side. It is situated behind the Cathedral and is the third oldest structure in Pisa's Cathedral Square. The tower's tilt began during construction, caused by an inadequate foundation on ground too soft on one side to properly support the structure's weight. The tilt increased in the decades before the structure was completed, and gradually increased until the structure was stabilized (and the tilt partially corrected) by efforts in the late 20th and early 21st centuries.

 

When you have completed this lesson, you will be able to determine the lengths of the sides in the triangles that outline the tower.

 

Outcomes

 

At the end of this lesson, you will be able to find missing sides using sin, cos and tan in a right triangle.

Lesson Questions

 

By the end of this lesson, you should feel comfortable solving the following questions:

  • In what situations can the concepts of trigonometry be used to solve problems?

  • How do I use sine, cosine, and tangent ratios to find missing sides in right triangles?

Lesson Completion and Assessment

 

As you work through each lesson, complete all the questions and learning activities in your binder using paper and pencil, clearly labeling your work (they refer to this as your course folder). These include the Are you Ready, Try This, Share and Self Check questions. Check your work if answers are provided. Remember that these questions provide you with the practice and feedback that you need to successfully complete this course.
Once you have completed all of the learning activities, take the Lesson Quiz. This is the assessment for each lesson and is located under the Assess tab or by using the Quizzes link under the Activities block.


** Note – Share questions may have to be done on your own depending on your learning situation**

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