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Transcript
Geometry 1.4 Notes Angles and Their Measures Objectives: Use angle postulates and become familiar with them Classify angles as acute, right, obtuse or straight Geometric Terms Picture Angle – Sides – Vertex – Notation Congruent Angles – Adjacent Angles - Acute Right Obtuse Straight Less than 90° 90° More than 90° 180° Geometry 1.4 Notes Example #1: Naming Angles Name the angles in the figure: A 1. 2. C B 3. D Refer to the diagram to answer the following questions. Given ABD GBE . D C A Find the measure of the following angles. 95° 40° B 45° E G 1. ABF ________________ 2. ABG ________________ 3. ABD ________________ 4. GBE ________________ 5. CBE ________________ 6. FBE ________________ F Geometry 1.4 Notes 9. Is ABG DBE and why? 10. Name 4 acute angles. 11. Name 4 obtuse angles. 12. Name 2 straight angles. 13. Name 2 adjacent angles. 13. In the diagram, could the 95 angle be named B ?