Chapter 1 Vocabulary

Points that lie on the same line are _________.

• coplanar
• collinear
• parallel
• perpendicular

Name that figure!

• acute angle

• right angle

• obtuse angle

• straight angle

A flat surface made up of points that has two dimensions and extends without end.

• Point
• Plane
• Angle
• Line

How many points do you need to make a line?

• 1
• at least 2
• 3
• 4

A set of points with which is part of a line and has 2 distinct endpoints is called a

• line

• line segment

• ray

• plane

 A line that extends indefinitely in one direction.

• line

• line segment

• ray

• plane

An angle which measures exactly 90 degrees

• Acute

• Right

• Obtuse

• Straight

An angle which has a measure that is greater than zero degrees but less than 90 degrees

• Acute

• Right

• Obtuse

• Straight

An angle which has a measure greater than 90 degrees but less than 180 degrees

• Acute

• Right

• Obtuse

• Straight

Identical geometric figures are

• Congruent

• Similar

• Coplanar

• Collinear