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Undefined Terms
Basic Definitions
Segments
Other
100
An undefined term in Geometry. It names a location and has no size.
What is a point?
100

points used to name a segment

What is an Endpoint?

100

A number used to identify the location of a point on a number line, coordinate plane or space.

What is a coordinate?

100

Number of points needed to name a line

What is 2?

200
An undefined term in geometry that is a straight path that has no thickness and extends forever.
What is a line?
200

Two segments that have the same length.

What are congruent segments?

200

Points, A, B, C, and D are collinear, and in that order. What is AC - BC?


What is AB?

200

What is used to show that two segments are congruent?

What is a stroke or hashmark?

300
An undefined term in Geometry, it is a flat surface that has no thickness and extends forever.
What is a plane?
300
Points that lie on the same line.
What is a Collinear?
300

Points A, B, and C are collinear and in that order. If AC is 28, and BC is 10, what is the length of AB?

What is 18?

300

Of the undefined terms, what would the surface of a desk represent?

What is a plane?

400
Part of a line that is bounded by two end points and contains every point onthe line between its endpoints.
What is a segment?
400

Points that lie on the same plane.

What is coplanar?

400

Given that AB = 8 and BC = 12, is AC necessarily 20? Explain your answer!

What is NO, because the given segments are not necessarily collinear.

400

Number of points needed to name a plane

What is 3?