advertisement

Lesson 1.6 – Measuring Angles Good definitions are very important in geometry!! In this lesson you will learn how to write a good definition. Which figure is a polyglob? ___________ Once you’ve written a definition you should test it by trying to find a counterexample. If you can find a counterexample, then you don’t have a good definition. Beginning Steps to Creating a good Definition: 1. Classify your term. What is it? (“A square is a 4-sided figure…”) 2. Differentiate your term. How does it differ from the others in that class? (“…that has four congruent sides and four right angles.”) 3. Test your definition by looking for a counterexample. Defining Angles: An angle is: __________________________________________________ Congruent Angles are: _________________________________________ Right Angle:_______________________________________________________________________________ Acute Angle: ______________________________________________________________________________ Obtuse Angle: _____________________________________________________________________________ Complimentary Angles: _____________________________________________________________________ Supplementary Angles: _____________________________________________________________________