Lesson Title: SOH-CAH- TOA- What? Curriculum Area: Math Technology Strand: Societal Issues Grade Level: 8

 Essential Question: How can trigonometric ratios help find missing angles or sides of right triangles?

 Activity Summary This activity is designed for 8th graders in Geometry or Algebra I who are using trigonometric ratios for the first time. In this lesson, students will learn how to find a missing angle or side of a right triangle, using the TI-83 Plus calculator. Curriculum Math 1.01 Use the trigonometric ratios to model and solve problems involving right triangles. The learner will identify and use the trigonometric ratios to solve problems with right triangles. Technology Societal Issues 3.01 Select and use a variety of technology tools to collect, analyze, and present information.

 Activating Strategies Hot Seats 1. Prior to the beginning of class, the teacher will prepare questions related to the topic of study and write them on sticky notes. 2. Place the sticky notes underneath student desks/chairs so that they are hidden from view. 3. At the start of the class, inform students that several of them are sitting on "Hot Seats" and will be asked to answer questions related to the topic of study for the day. 4. Have students check their desks/chairs for the strategically placed sticky notes. 5. Students who have questions on sticky notes will then take turns reading the question and attempting to provide an answer. Due to the nature of this motivational activity, these should be questions that students are able to answer. Hot Seat Questions and Answers 1. When given 2 angles of a triangle, what theorem helps you find the third angle? (Angle Sum Theorem) 2. In a right triangle, if you know the length of 2 of the sides, what theroem do you use the find the length of the third side? (Pythagorean Theorem) 3. What is the sum of all the angles in a triangle? (180 degrees) 4. What is the Triangle Inequality Theorem? (The third side of a triangle is between the sum and difference of the first two sides.)

 Technology Vocabulary: Detailed Technology Instructions: