5 th Grade Geometry Lines & Angles Lauri Hagie IDT 503 Final Project.
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5 5 th th Grade Grade Geometry Geometry Lines & Angles Lines & Angles Lauri Hagie Lauri Hagie IDT 503 IDT 503 Final Project Final Project
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Transcript of 5 th Grade Geometry Lines & Angles Lauri Hagie IDT 503 Final Project.
55thth Grade Geometry Grade GeometryLines & AnglesLines & Angles
55thth Grade Geometry Grade GeometryLines & AnglesLines & Angles
Lauri HagieLauri HagieIDT 503IDT 503
Final ProjectFinal Project
Lines
• Lines have arrows on each end.
• Lines do not end; they go on and on forever in both directions.
Line Segments• Line segments
may also be called segments.
• Line segments are part of a line.
• Line segments do not have arrows.
Rays• Rays begin with a
point at one end.
• Rays go on and on forever in only one direction.
• Rays have an arrow on one end.
Horizontal• Lines, segments, and
rays may be drawn horizontally.
• Horizontal means level with the horizon.
• The horizon is the line in the distance where the land and the sky meet.
Horizontal Line
Horizontal Segment
Horizontal Rays
Vertical
• Lines, segments, and rays may be drawn vertically.
• Vertical means straight up and down.
Vertical Line
Vertical Segment
Vertical Rays
Oblique
• Lines, segments, and rays may be oblique.
• Oblique means slanted.
Oblique Segment
Oblique Rays
Oblique Line
Parallel• Lines, segments, and
rays may be parallel.
• Parallel lines go in the same direction and will never cross over each other.
• Parallel lines can be horizontal, vertical or oblique.
Parallel, Horizontal Segments
Parallel, Vertical Rays
Parallel, Oblique Lines
Intersecting
• Lines, segments, and rays may cross over each other.
• We call this intersecting.
Intersecting Segments
Intersecting Rays
Intersecting Lines
Perpendicular
• Lines, segments, and rays may be perpendicular.
• When lines intersect and form square corners, we call them perpendicular.
Perpendicular Segments
Perpendicular Rays
Perpendicular Lines
Angles• Angles form when lines, segments,
or rays intersect.
• There are 3 types of angles:– Acute– Right– Obtuse
Right Angles• Right angles are 90
• They form square corners.
Acute Angles• Acute angles are less than 90
• “A cute” little angle.
Obtuse Angles
• Obtuse angles are greater than 90
Quiz Time!Name this figure:
Line Segment Ray
Correct!Way to go,
You are right!
Sorry…Your answer
was not correct. Try again.
Quiz Time!Name this figure:
Horizontal Vertical Oblique
Correct!Way to go,
You are right!
Sorry…Your answer
was not correct. Try again.
Quiz Time!Name this figure:
Parallel Perpendicular
Correct!Way to go,
You are right!
Sorry…Your answer
was not correct. Try again.
Quiz Time!Name this figure:
Acute Right Obtuse
Correct!Way to go,
You are right!
Sorry…Your answer
was not correct. Try again.
The EndYou are now a 5th grade expert
in geometry!
Hake, S., & Saxon, J. (2001) Math 65: an incremental development, 2nd edition. Norman, OK: Saxon Publishers, Inc.
