1. Warm-up 1.) What types of triangles have you studied? What are characteristics of each one? 2.) Given 2 sides of a triangle find the third side a.)b.) c.) 3.) What is the name a theorem you might have used to solve these? When do you use it?

2. 2.) Given 2 sides of a triangle find the third side a.) Use Pythagorean THM. OR notice that triangle is isosceles & Right => 45/45/90. We’ll come back to this method of solving in today’s lesson

3. 2.) Given 2 sides of a triangle find the third side b.) USE PYTHAGOREAN THM

4. 2.) Given 2 sides of a triangle find the third side c.) USE PYTHAGOREAN THM OR NOTICE that this is a 30/60/90 triangle Stay tuned for this method.

5. 3.) What is the name a theorem you might have used to solve these? PYTHAGOREAN THM When do you use it? WITH RIGHT TRIANGLES ONLY

6. Review: Special Right Triangles 45 º-45 º-90 º triangle

7. Review: Special Right Triangles 45 º-45 º-90 º triangle Answers :EXACT & dominator rationalized

8. Review: Special Right Triangles 30º-60 º-90 º triangle

9. Area of Triangles: = ½ b*h b is length of the base h is height of triangle

10. Area of Triangles: = ½ b*h ANY TRIANGLE:

11. Area of Triangles: = ½ b*h Height may be outside triangle

12. Example: Find Area of Triangle A.)B.) 3in s 60º

13. Area of a Equilateral Triangle in terms of side length:

14. Example: Find Area of Triangle 150º 15º 7in