This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Geometry: Angle Measures
Do Now:What is the distance between R and Q?
What is the distance between S and R?
Homework
Questions?
Struggles?
Ask Ask Ask!
Definitions: Angle: An angle is formed by
two non-collinear rays that have a common endpoint.
Sides: The rays are the sides of the angle
Vertex: The endpoint is called the vertex of the angle.
Ex:
Example One:
Example Two:
Which angles have R as a vertex?
What are the sides of <1?
What is another name for <SRP?
Angles- Four Types
Obtuse Angles: Are greater than 90 degrees but less than 180 degrees.
Ex:
Angles- Four Types
Acute Angles: Are less than 90 degrees
Ex:
Angles- Four Types
Right Angles: 90 degree angles
Denoted by a little square.
Ex:
Angles- Four Types
Straight Angles: 180 degree angle
i.e. a straight line.
EX:
Protractors Steps to measuring an angle:
Line up the vertex with the center point of the protractor.
Line up the zero line on the protractor with one side of the angle.
Extend the other side of the angle using a ruler or straight edge if needed.
Wherever the other side of the angle hits the protractor is the measure of your angle!