Lines and
Angles
Ms. McGhee
3rd grade 2015
Lines
Lines
 Lines
 Rays
 Segments
 Parallel lines
 Perpendicular lines
 Intersecting lines
 Point
 Midpoint
Lines
 Lines are a straight set of points that
extend (stretch) in opposite directions.
 Lines are everywhere!
Rays
 A ray is part of a
line that starts at an
end point and
extends in the
opposite direction.
Segments
 A segment is part of
a line that starts and
ends between two
endpoints.
Parallel Lines
 Parallel lines are two
or more lines beside
each other that
never intersect.
Perpendicular Lines
 Perpendicular lines
are lines that
intersect at square
corners.
Intersecting Lines
 Intersecting lines meet
at a common point.
Quiz: What do you know?
What type of lines do you see?
Angles
 Right
 Obtuse
 Acute
Right Angle
 A right angle is
always 90 degrees
and forms a
square in the
corner.
Obtuse Angles
 Obtuse angles
are greater
than a right
angle.
Acute Angles
 Acute angles are
less than right
angles.
What types of angles do you see?

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