Lesson 1.4 Measuring and Classifying Angles. Objective Name, measure, and classify angles.

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Presentation transcript:

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 Consists of two different rays with the same endpoint.

Vertex Endpoints of rays in a angle

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

Example Name 3 angles

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

Classify Angles Use a protractor to measure angles

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

Example Problem

Indy Practice

Congruent Angles Angles with the same measure A B

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

Example

Practice