Lines and angles presentation_updated

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Lines and
Angles
Ms. Ghio
3rd grade

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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