Unit 4 Chapter 6 Section 1a Angle Measures.notebook
February 08, 2016
Bell Ringer­ answer these on the back of your new guided notes
Feb 12­11:12 AM
1
Unit 4 Chapter 6 Section 1a Angle Measures.notebook
February 08, 2016
Check your readiness
pg. 212 #'s 1-19
Feb 8­8:09 AM
2
Unit 4 Chapter 6 Section 1a Angle Measures.notebook
February 08, 2016
Unit 4
Chapter 6 Section 1a
Angle Measures
Angle(
Angles
): a figure formed by two rays with a
common endpoint
Name
Measure
acute angle
greater than 0 and less than 90
right angle
equal to 90
obtuse angle
straight angle
greater than 90
and less than 180
equal to 180
Jun 6­8:17 PM
3
Unit 4 Chapter 6 Section 1a Angle Measures.notebook
February 08, 2016
Complementary: the sum of the measures of two
o
angles = 90
Example:
1
2
Supplementary: the sum of the measures of two
o
angles = 180
Example:
1
2
Adjacent angles: share a vertex and a side but have no
next to
interior points in common
Example:
1 and
2 are adjacent
1
2
Vertical angles: formed by 2 intersecting
lines and are opposite each other
Example:
1 and
3 are vertical
2
1
3
4
Congruent angles: angles with equal measures
Dec 23­7:06 AM
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