## Unit 5 - Trigonometry & Triangles

Triangles are the most basic closed polygon. 3D images in computer generated graphics revolve around the most basic of 2D shape - the triangle. In this chapter, we will apply our understanding of angles and side-lengths to solve problems, specifically with triangles.

### 5.1 - Labeling Triangles for SOH CAH TOA

**A: Fri. Oct. 30th**

**B: Mon. Nov. 2nd**

Mathspace Lesson and Homework

(if the link above doesn't work, click here)

Old Lesson Filled [ **Ol****d File 1** | **Old File 2** ]

**5.1 Helpful Videos:**

### 5.2 - The Primary Trig Ratios: SOH CAH TOA

**A: Fri. Oct. 30th**

**B: Mon. Nov. 2nd**

**5.2 Helpful Videos:**

▶ Solving Ratios (Recall)

▶ Intro to Trig Ratios (Khan)

▶ Trig Examples (Khan)

### 5.3 - Finding Missing Angles & Sides

**A: Fri. Oct. 30th**

**B: Mon. Nov. 2nd**

**Mathspace Practice Task** (Homework)

**5.3 Helpful Videos:**

▶ Solve for a Missing Side (Khan)

▶ Two Examples (Eddie Woo)

### 🏠 5.4 - Solving Right Triangles

**A: Mon. Nov. 2nd**

**B: Tues. Nov. 3rd**

Still lost? Here's a

**Re-Introduction to Trig**

**5.4 Helpful Videos:**

▶ Solving a Triangle (NancyPi)

▶ Solve Right Triangle 1

▶ Solve Right Triangle 2

▶ Solve Right Triangle 3

▶ Word Problem Example

### 5.5 - Applications of Right Triangles

**A: Tues. Nov. 3rd**

**B: Wed. Nov. 4th**

**Mathspace Task** (Homework)

**Angle of Depression Example**(Two buildings)

**STILL UNDER CONSTRUCTION!**

**STILL UNDER CONSTRUCTION!**

### 5.7 - The Cosine Law

Lesson File [ **Per. ②** | **Per. ③** ]

**Playlist on the Law of Cosines**(the Cosine Law)No - there is no "Tan Law"

### Review for Assessment!

Overview of Topics (in class)

Paper Practice (distributed in class)

Mathspace does not provide reviews or extra questions beyond the homework. To prepare for the test you will be given a paper review.