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##### Angles

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**Angles**By: Emily Angleberger**Vertex**• Each angle has a vertex. • A vertex is the point where two rays meet and form an angle Ray 1 Vertex Ray 2**Naming Angles**A ABC CBA B B C • You can name an angle by all three points, with the vertex in the center. • Or you can use just the letter of the vertex.**Let’s Name These Angles**• Write the name of these angles in three different ways. EFD ABC E A DFE CBA F B B C F D HIG GIH JLK H K I J KLJ L I G L**Classifying Angles**An acuteangle measures less than 90°. A right angle measures exactly 90°. An obtuse angle measures more than 90°.**Classify These Angles**Acute, Obtuse, or Right Obtuse Acute Acute Right**Let’s Measure Angles!**• http://www.amblesideprimary.com/ambleweb/mentalmaths/protractor.html