lesson 1.4 measuring and classifying angles. objective name, measure, and classify angles
Post on 04-Jan-2016
224 Views
Preview:
TRANSCRIPT
Lesson 1.4Measuring 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 A
The angle with sides AB and AC can also be named orBAC CAB
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
RSTRSTRSP PST
RSTPSTRSP
Example Problem
Indy Practice
Congruent Angles
• Angles with the same measure
A B
BA
BA
Angle Bisector
• A ray that divides an angle into two angles that are congruent
Example
Practice
top related