lines and angles

1. Lines and
Angles
Ms. Ghio
3rd grade

2. Lines
Lines
 Lines
 Rays
 Segments
 Parallel lines
 Perpendicular lines
 Intersecting lines
 Point
 Midpoint

3. Lines
 Lines are a straight set of points that extend
(stretch) in opposite directions.
 Lines are everywhere!

4. Rays
 A ray is part of a line
that starts at an end
point and extends in
the opposite
direction.

5. Segments
 A segment is part of a
line that starts and
ends between two
endpoints.

6. Parallel Lines
 Parallel lines are two
or more lines beside
each other that never
intersect.

7. Perpendicular Lines
 Perpendicular lines
are lines that intersect
at square corners.

8. Intersecting Lines
 Intersecting lines meet
at a common point.

9. Quiz: What do you know?

10. What type of lines do you see?

11. Angles
 Right
 Obtuse
 Acute

12. Right Angle
 A right angle is
always 90 degrees
and forms a square
in the corner.

13. Obtuse Angles
 Obtuse angles
are greater than
a right angle.

14. Acute Angles
 Acute angles are less
than right angles.

15. What types of angles do you see?