3.1 lines and angles

Name a line skew to FG

• EH

• DC

• AD

• FB

What does collinear mean?

• Points on the same plane

• Two lines that never intersect

• Points on the same line

• Lines that cross each other

What kinds of lines are pictured?

• Parallel

• Perpendicular

• Intersecting

• Skew

What are parallel lines?

• Two lines that never cross

• Two lines that intersect

• Two lines that intersect at 90 degrees

• Two lines

What does perpendicular mean?

• Lines cross each other

• Lines cross at 90 degrees

• Lines never touch

• Lines are skew

Name a line parallel to AD

• EH

• AB

• DC

• HG

Name a line perpendicular to AD

• EH

• AB

• CG

• HG

Name a line skew to AD

• EH

• AB

• CG

• EH

Are lines j and k skew?

• yes

• no

These angles are...

• Complementary

• Supplementary

• Neither