Chapters 7 & 8Trigonometry!

The study of triangles

Welcome to Geometry B! Welcome

Pretest

Hk: 7-3 Triangle Similarity, answer Focus Questions1) Name 3 triangle similarity theorems and explain how to use each to show triangles similar.2)  Draw and label 2 similar triangles and explain how to write a similarity statement.3) How do we use the fact that triangles are similar to find missing side and angle measures?  Give examples to explain your reasoning

7-3 Similar Triangles  Class work: p483 ex 9-23 odd, 32, 39, 42-45 all

 Homework: Video 7-4, answer Focus Questions

1) State the Triangle Proportionality Theorem and give an example of how to use it.

2) State the Converse of the Triangle Proportionality Theorem and give an example of how to use it.

3) State the Triangle Midsegment Theorem and give and example of how to use it.

4) Explain and give an example of how to use Corollary 7.1 Proportional Parts of Parallel Lines

5) Explain and give an example of how to use Corollary 7.2 Congruent Parts of Parallel Lines

7-4 Parallel Lines, Corresponding Parts and the Midsegment Theorem

Class work: p495 ex 1-9, 19, 22, 35, 53-56 all, 63

Homework: Watch video 8-1 & answer Focus Questions1) How do you find the geometric mean given 2 numbers? Give an example.

2) Draw a right triangle and then draw an altitude from the right angle to the hypotenuse. Label all intersections. Then write a similarity statement relating the 3 triangles in the figure. (like example 2)

3) State and given an example of how to use the Right Triangle Geometric Mean Theorems 8.2 and 8.3 (use p539 and example 3)

8-1 Geometric Mean

Class Work: p541 Ex 1-7, 20, 24, 25, 54-57

 Homework: Quiz Practice 7-3, 7-4, 8-1 on Connect Ed

Quiz Today!!! Lessons 7-3, 7-4, 8-1

Homework: 8-2 video and answer the Focus Questions

1) State the Pythagorean Theorem, explain where to find “c” in a right triangle, and give an example of how to use the theorem to find a missing hypotenuse and how to use it to find a missing leg.

2) Define “Pythagorean Triple” and give both an example and a non-example of a Pythagorean Triple.

3) What is the Converse of the Pythagorean Theorem and how do we use it?

4) What are the Pythagorean Inequality Theorems and how do we use them to determine whether a triangle is acute, right, or obtuse? Give an example.

8-2 Pythagorean Theorem and it’s Converse; Using the Pyth. Thm to classify triangles

Class Work: p551 Ex 1-10, 19, 20, 28, 43, 53-56 all

Hk: Watch video 8-3 and answer the Focus Questions1)   What is the ratio between the legs and the hypotenuse of a 45-45-90 triangle (an

isosceles right triangle)?   a.  Give an example of using the ratio to find a missing leg length given the

hypotenuse. b.   Give an example of using the ratio to find the length of a hypotenuse given

the leg.2)   What is the ratio of the short leg to the long leg and the short leg to the

hypotenuse in a 30-60-90 triangle? (1/2 of an equilateral triangle) a. Use this ratio to find the length of a short leg given the length of the long leg. b. Use this ratio to find the length of the hypotenuse given the length of the short

leg.3)   Explain how to use the 30-60-90 ratios to find the width of an equilateral triangle.

8-3 Special Right Triangles Class work: p562 Ex 1-7, 27, 29, 32, 34, 35, 36, 46, 51-54

HK: Watch video 8-4 & answer Focus Questions

1) Define Trigonometry 2) What is a trigonometric ratio? Draw and label a right triangle and give

an example of a trigonometric ratio. 3) Give the sine, cosine, and tangent ratios and explain how the acronym

Soh Cah Toa helps keep them straight 4) Give a real world example of how to find the missing length of a triangle

using one of the trigonometric ratios 5) Give the 3 inverse trigonometric ratios, explain how they are related to

the sine, cosine, and tangent ratios, and tell what we use them to find. 6) Give an example of how to find angle measures using inverse

trigonometric ratios.

8-4 Trigonometry Using Soh Cah Toa & Solving Triangles

Class work: p573 ex 1-14, 35

HK: Watch 8-4 videos B & C and answer Focus Questions

1) What does it mean to "solve a right triangle"? 2) Give an example of solving a right triangle given 2 side lengths.3) Give an example of solving a right triangle given a side length and

an angle measure.

8-4 continued…

Class work p573 ex 15, 18-33 multiples of 3, 43, 44, 51, 66-69

Homework: watch 8-5 video and answer Focus Questions

1) Explain and give an example of an angle of elevation.2) Explain and give an example of an angle of depression.3) Give an example of how to use an angle of elevation to find a

missing distance. 4) Explain and give an example of how to use an angle of depression to

find a missing distance.

8-5 Angles of Elevation and Depression

Class Work: p583 ex 4-7, 11, 13, 15, 16, 25, 28-31, 38

Homework: ConnectEd quiz practice 8-2 thru 8-5

Quiz TOMORROW on 8-2 thru 8-5

Quiz 8-2 thru 8-5Homework: 8-6 videos Law of Sines & Law of Cosines

Focus Questions1) Do you need to have a right triangle to use the Laws of Sines and Cosines?

2) What is the Law of Sines? Give an example of how we would use it to find a side length.

Give an example of how to use it to find a missing angle measure.

3) State the Law of Cosines. Give an example of how to use it to find a missing side length.

Give an example of how to use it to find a missing angle measure.

4) Explain and give an example of how to solve a triangle using the Laws of Sines and Cosines.

8-6 Law of Sines and Law of Cosines

Class Work: p592 ex 1-11, 21, 28, 29, 30, 59-62

Homework: 8-7 Vectors with Focus Questions1) What does a vector describe?2) Draw a vector and label the initial and terminal points. 3) Define the magnitude of a vector. 4) How do we describe the direction of a vector? Give an example5) How do we find the magnitude and direction of a vector? (like example 4)5) How do we add and subtract vectors? (like example 5)6) What is scalar multiplication?

8-7 Vectors

Class work: p605 ex 7-10, 43-45, 46, 54-57          

Homework: Chapter 8 Test Review

Big Review Day!!!

Correct Paper Review

Go Over Free Response IN DETAIL

Online Test Practice

Chapter 8 Test

HK: 9-1 & 9-2 videos on Reflections and TranslationsFocus Questions1) Define a "Reflection in a Line".2) Explain how to reflect a figure over a line. 3) If you reflect a point (x, y) over the x axis how do the coordinates change?

What if you go over the y axis? The line y=x? 4) What is a translation and how are vectors related to translations?5) Give an example of how to translate a figure.6) Explain how vectors a used to translate a figure on the coordinate plane.

Give an example of translation notation.