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Lesson 1.4

Lesson 1.4. Measuring and Classifying Angles. Objective. Name, measure, and classify angles. Standard 1.0. Students will demonstrate understanding by identifying and giving examples of undefined terms, axioms, theorems, and inductive and deductive reasoning. Angle.

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Lesson 1.4

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  1. Lesson 1.4 Measuring and Classifying Angles

  2. Objective • Name, measure, and classify angles

  3. Standard 1.0 • Students will demonstrate understanding by identifying and giving examples of undefined terms, axioms, theorems, and inductive and deductive reasoning

  4. Angle • Consists of two different rays with the same endpoint.

  5. Vertex • Endpoints of rays in a angle

  6. Angle A or The angle with sides AB and AC can also be named or

  7. Example • Name 3 angles

  8. Degrees are the unit of measure for an angle • Angles are measured in degrees because they are a portion of a circle.

  9. Classify Angles Use a protractor to measure angles

  10. Angle Addition Postulate • If P is in the interior of , then the measure of is equal to the sum of the measures of and

  11. Example Problem

  12. Indy Practice

  13. Congruent Angles • Angles with the same measure A B

  14. Angle Bisector • A ray that divides an angle into two angles that are congruent

  15. Example

  16. Practice

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