We played a review game today in preparation for our **Unit 7 test on Friday, March 22nd**.

## Today’s links

- Homework: HW 7.11 – Unit 7 Test Review 1
- Lesson Video Archive

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We played a review game today in preparation for our **Unit 7 test on Friday, March 22nd**.

- Homework: HW 7.11 – Unit 7 Test Review 1
- Lesson Video Archive

Finish reading chapter 22, pages 586-597, and also read over the Chapter 22 Investigative Task, which will be your homework for Thursday (due on Friday).

Tonight, from pages 597-603, do exercises 3, 31, 33, and 45.

Our test on Unit 7 will be on **Friday, March 22**, so we’ll spend tomorrow and Thursday reviewing the Law of Sines, Law of Cosines, and related information ahead of this test.

Tonight, please **finish** HW 7.10.

- Homework: HW 7.10 – More Law of Cosines
- Notes (examples on solving SAS and SSS triangles)
- Lesson Video 1 (Law of Cosines with SAS triangle)
- Lesson Video 2 (Law of Cosines with SSS triangle)

Read pages 574-586 (up to “A Hypothesis Test for the Mean”). There will be a reading quiz in class tomorrow about the “Just Checking” section of this reading.

From pages 597-599, do exercises 2, 7, 11, 16, 28

We did some more work with the Law of Cosines today, specifically looking at two cases where it is useful: when given two sides and a single angle between them (SAS) and when given three sides but no angles at all (SSS). Note that this second case is exactly what your poster will feature!

- Homework: HW 7.10 – More Law of Cosines (you may skip questions 5 and 6)
- Notes (examples on solving SAS and SSS triangles)
- Lesson Video 1 (Law of Cosines with SAS triangle)
- Lesson Video 2 (Law of Cosines with SSS triangle)

By Tuesday the 19th, after the four day weekend, please also work on the multiple choice problems from the Unit 5 Practice Exam on pages 568-572 (1-30, all).

As we’ve observed in class, in order to use the Law of Sines, you must know (or be able to find easily) an opposite angle-side pair in the triangle. But what if all you have is two sides and an angle? Is there anything we can do with that? Enter the Law of Cosines, a generalization of the Pythagorean Theorem to non-right triangles.

Also, don’t forget about your poster project, due next Tuesday!

- Homework: HW 7.9 – Introducing Law of Cosines
- Notes
- Lesson Video 1 (Law of Cosines with SAS triangle)
- Lesson Video 2 (Law of Cosines with SSS triangle)

The puzzle you picked up in class will be collected tomorrow during the group redo (first period students should report to Ms. Seifert’s room as usual).

By Tuesday the 19th, after the four day weekend, please also work on the multiple choice problems from the Unit 5 Practice Exam on pages 568-572 (1-30, all).

After today’s quiz, we have the usual post-quiz homework/extra credit. This is a **review** of old content. Do **one side** (your choice) for a homework credit. Do **both sides** for extra credit on the quiz (you must show your work!)

Our Unit 5 test is **tomorrow**.

- You got a review packet in class today. Check your answers from the textbook review and work on the additional practice problems you can find there.
- Work on some more of the review problems from pages 562-568. I can provide additional answers for you to look at (for security and copyright reasons, I cannot post them online).
- As always, post here or email me with any other questions you may have.

Our Unit 5 test will be on **Wednesday, March 13**. In preparation, please work on some of the review from the end of the unit. Read the unit summary on page 562, then on pages 562-568 do exercises 5, 6, 11, 12, 18, 30, 31, 37.

**Date Due: Tuesday, March 19**

**Details: **Unit 7 Trigonometry Poster assignment

**Rubric preview:** Unit 7 Trigonometry Poster Rubric

**Recommended timeline:**

- Take and print pictures by
**Thursday, March 14** - Complete poster by
**Tuesday, March 19**

Your quiz on Unit 7 so far (Law of Sines and Sine formula for area) is **tomorrow, Tuesday March 12**.

After this quiz, we will move on to the next phase of the unit, a discussion of the Law of Cosines. Over the four-day weekend, I will want you to work on the Unit 7 Trigonometry Poster assignment. Full information can be found at that link, and a preview of the rubric for the project can be found here (please note that this rubric is subject to change).

- Homework: HW 7.7 – Sine Quiz Review
- Quiz Review Answers
- Lesson Videos

We will have our Unit 5 test on **Wednesday, March 13**. Monday and Tuesday we’ll spend some time reviewing.

In preparation, please work on some of the review from the end of the unit. Read the unit summary on page 562, then on pages 562-568 do exercises 5, 6, 11, 12, 18, 30, 31, 37.

We will have a quiz on what we’ve done from Unit 7 so far (Law of Sines and Sine formula for area) on **Tuesday, March 12**. For a visual summary of the various cases of the Ambiguous Case, watch this video.

We’ll spend some more time on Monday reviewing, but this weekend please finish the IXL assignment given in class. Complete the three IXL modules linked below to a score of at least an 80 on each. All three modules count as a separate homework credit, and any score above 80 will count as extra credit!

From the exercises of chapter 21 (pages 557-559), do 6, 9, and 27.

More practice with the Ambiguous Case today! Remember: triangles where two sides and a non-included angle are given could actually refer to two different triangles, one unique triangle, or no valid triangles at all.

- Homework: HW 7.6 – More Solving Ambiguous Cases
- Lesson Video – Note that part of the “ambiguity” of the ambiguous case is that the same “SSA” set of information could determine 2, 1, or no triangles at all. We’ll have some more time to practice this in class.

On Tuesday, we introduced the “Ambiguous Case” of the Law of Sines. Today, we spent some time working on how exactly one handles that situation.

- Homework: HW 7.5 – Solving Ambiguous Cases
- Notes: Day 7.5 – Solving Ambiguous Cases Notes
- Lesson Video – Note that part of the “ambiguity” of the ambiguous case is that the same “SSA” set of information could determine 2, 1, or no triangles at all. We’ll have some more time to practice this in class.

Read through Chapter 21 today, pages 541-556. No exercises assigned yet, just the reading!

One possible flaw with the Law of Sines is an issue of ambiguity that arises when trying to use it to find a missing angle measure.

We did an activity in class, so if you missed it you should watch the following short videos to see what it involved (they’re taken from another class that did the same activity): Setup, Partial Solution, Full Solution, Alternate Full Solution