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Angles

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.

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Angles

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  1. Angles By: Emily Angleberger

  2. Vertex • Each angle has a vertex. • A vertex is the point where two rays meet and form an angle Ray 1 Vertex Ray 2

  3. 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.

  4. 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

  5. Classifying Angles An acuteangle measures less than 90°. A right angle measures exactly 90°. An obtuse angle measures more than 90°.

  6. Classify These Angles Acute, Obtuse, or Right Obtuse Acute Acute Right

  7. Let’s Measure Angles! • http://www.amblesideprimary.com/ambleweb/mentalmaths/protractor.html

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