Download Aim #71: How do we identify angles? (Unit 8

Aim #71: How do we identify angles?
(Unit 8 - Geometry)
2-8-17
HW #71: Types of Angles Handout
Do Now: Name each numbered angle in the diagram below.
E
A
1
C
5
2
3
F 4
D
B
Geometry Vocabulary
Term
Definition
Point
shows a location or a
position
Line
Plane
Line Segment
Ray
Angle
Parallel Lines
set of all points
extending endlessly
in both directions
set of points that
forms a flat surface
extending endlessly
in all directions
part of a line that
has
two endpoints
has one endpoint and
extends endlessly in
one direction
made up of two rays
that share a common
endpoint called the
vertex
lines that never
intersect
lines that intersect
to
Perpendicular Lines
form right angles
Diagram
Specific Angles
Type of Angle(s)
Acute Angle
Obtuse Angle
Right Angle
Straight Angle
Description
an angle whose
measure is less than
90 degrees
an angle whose
measure is more than
90 degrees and less
than 180 degrees
an angle whose
measure is exactly 90
degrees
an angle whose
measure is exactly
180 degrees
Vertical Angles
a pair of opposite
angles formed when
two lines intersect
Complementary
Angles
two angles whose sum
is 90 degrees
Supplementary
Angles
two angles whose sum
is 180 degrees
Adjacent Angles
angles that are next
to each other (share
a
common ray)
Congruent Angles
two angles whose
measures are equal
Linear Pair
two adjacent angles
that form a straight
line
Example