Parallel and

Perpendicular Lines

Vocabulary right anglean angle that measures exactly 90°

perpendicular lineslines that intersect and form angles that measure 90° parallel lineslines in the same flat surface that never intersect

intersecting lineslines that cross at one point

Examples of Lines Parallel lines are always in

the same plane, or two-dimensional space . Parallel lines are always the same distance apart.

Intersecting lines cross each other. They can intersect, or cross, at one point or at all points.

Real Life Examples

More Vocabulary Compass- a tool used to draw circles

and to measure in constructions

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Questions 1. What are perpendicular lines?

2. Give one example of perpendicular lines that you see around you every day.

Questions 3. What are intersecting lines?

4. Give one example of intersecting linesthat you see around you every day.

Questions 5. What are parallel lines?

6. Give one example of parallel lines that you see around you every day.

What Kind of Line?

What Kind of Line?