Geometry Basics Vocabulary

What is an angle with a degree measure of 180° called?

• Right angle

• Acute angle

• Obtuse angle

• Straight angle

What are two angles that have the same measure called?

• Adjacent angles

• Vertical angles

• Congruent angles

• Right angles

What are two angles that share a common side and vertex called?

• Congruent angles

• Vertical angles

• Right angles

• Adjacent angles

According to the Angle Addition Postulate, if ∠ABD and ∠DBC are adjacent, what is the sum of ∠ABD and ∠DBC?

• ∠ABD + ∠DBC = ∠ABD

• ∠ABD + ∠DBC = ∠DBC

• ∠ABD + ∠DBC = ∠ABC

• ∠ABD + ∠DBC = ∠ABD + ∠DBC

What is a line or ray that divides an angle into two equal parts called?

• Adjacent angle

• Angle bisector

• Vertical angle

• Congruent angle

What are two angles directly across from each other on intersecting lines called?

• Adjacent angles

• Congruent angles

• Vertical angles

• Right angles

Do complementary angles have to be adjacent?

• Yes

• No

• Sometimes

• Only if they are equal

What is an Adjacent Angle?

• Two angles that share a common vertex and side, but have no common interior points

• Points that lie in the same plane

• The absolute value of the difference of two coordinates on a line

• Points that lie on the same line

What are Complementary Angles?

• Two adjacent angles whose non common sides are opposite rays

• A geometric drawing that ues a limited set of tools, usually a compass and a straightedge

• Two angles whose measures have a sum of 90

• Two angles whose measures have a sum of 180

What is another name for a Linear Pair?

• Acute Angle

• Straight Angle

• Obtuse Angle

• Right Angle