9-4-2014  Please grab notes from the back  Get out your HW to grade.

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Presentation transcript:

 Please grab notes from the back  Get out your HW to grade

ALL ABOUT ANGLES DAY 1 Intro to vocabulary and Angle Addition Postulate

ESSENTIAL QUESTION  How does and angle bisector compare to a segment bisector?  How doe the Angle Addition Postulate compare to the Segment Addition Postulate?

ANGLES  Two RAYS meet at a POINT and extend infinitely form an ANGLE.  Sides -  Vertex -

NAMING ANGLES  Name an angle by:  Its vertex point if there is only one angle.  Three letters with the vertex point as the middle letter.  A small number if one is given.

ANGLE MEASURE  Angles are measured in DEGREES from 0 to 360.  There are 4 angle types based on measure.  ACUTE – < 90 degrees  RIGHT – Exactly 90 degrees  Obtuse - > 90 degrees  Straight (Opposite Rays) – Exactly 180 degrees

ANGLE BISECTOR  A ray or line that cuts and angle in half forming two smaller congruent angles.

COMPARE  First is asking for the measure of angle ABC  Second is naming angle ABC

EXAMPLE 1  Classify the following  1. Angle 1  2. Angle BOA:

ANGLE ADDITION POSTULATE

EXAMPLES

SUMMARY  In your summary, answer the Essential Question of the day.