1. Lesson 1.3: Also 0.2 & 0.3 1.Vocabulary Quiz 2.Homework Discussion 3.Angle Vocabulary

2. Writing Good Definitions: Add to your Learning Targets Handout 1.Classify Your Term. “What is it?” 2.Differentiate your term. How does it differ from others in that class? 3.Test your definition by looking for a counterexample. Example: 1.A square is a four-sided figure… 2.…that has four congruent sides and four right angles.

3. Counterexamples Is there a better way to define a square? How?

4. Warm Up

5. Defining Terms: Parallel Lines – Perpendicular Lines –

6. On your Learning Targets.. Define each term Describe how to show it with a symbol or marking Do you understand the concept you are displaying? Example: Parallel – Have the same slope Indicate with corresponding numbers of arrow heads on line

7. Investigation: On p. 49-50, complete the investigation with the person next to you. Based on the diagrams provided, update your definitions in your vocabulary notebook. Edit as needed. Be sure to include both a diagram and a definition for each term.

8. Angle Definitions: Right Angle – Acute Angle – Obtuse Angle –

9. Angle Definitions: Complementary Angles – Supplementary Angles – Vertical Angles – Linear Pair of Angles –

10. Construction and Measurement Tools: The straightedge and the compass are classic tools used by the ancient Greeks. We will use these tools to construct designs with lines and circles over the next couple of days. Tools for measuring: ruler, protractor Which do you think are the more accurate tools?