Lines and Angles Vocabulary

Front

Lines that run from left to right

Back

Horizontal line

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Front

Two lines that stay the same distance apart and never intersect

Back

Parallel lines

Tags

CCSS.HSG.CO.A.1

Front

An angle that measures LESS than 90 degrees

Back

Acute angle

Tags

CCSS.4.G.A.1

Front

An angle that measures greater than 90 degrees

Back

Obtuse angle

Tags

CCSS.4.G.A.1

Front

Two lines that meet or cross at any given point

Back

Intersecting lines

Tags

CCSS.HSG.CO.A.1

Front

An angle that measures exactly 90 degrees

Back

Right angle

Tags

CCSS.4.G.A.1

Front

Lines that are perpendicular to each other

Back

Perpendicular lines

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Front

A straight line that goes up and down

Back

Vertical line

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Front

A line that divides an angle into two equal parts

Back

Angle bisector

Tags

CCSS.4.G.A.1

Front

The point where two lines intersect

Back

Point of intersection

Tags

CCSS.HSG.CO.A.1