Geometry Vocabulary Test

Front

What are vertical angles?

Back

Vertical angles are angles that are opposite each other when two lines intersect. They are always congruent (equal measures).

Front

What is a line perpendicular to line AD?

Back

A line that intersects line AD at a right angle (90 degrees). For example, line AB is perpendicular to line AD.

Front

What geometric object is created by two rays with a common starting point?

Back

An angle.

Front

If two points lie on the same plane, are they collinear?

Back

FALSE. Two points on the same plane are not necessarily collinear; they can be anywhere on that plane.

Front

What undefined term does a sheet of paper illustrate?

Back

A plane.

Front

What is a ray in geometry?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

Define a line segment.

Back

A line segment is a part of a line that has two endpoints.

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

What is the definition of a point in geometry?

Back

A point is a location in space that has no size or dimension.

Front

What is the difference between a line and a line segment?

Back

A line extends infinitely in both directions, while a line segment has two endpoints.