1.1 Points Lines and Planes

Question 1

Concepts that are so basic it is impossible to write a definition that does not refer to the term being defined.

Answer 1

Undefined Terms

Question 2

Names a location and has no dimension.

Answer 2

Point

Question 3

Names a straight path of points in a plane, has no width or thickness, and continues forever in one dimension.

Answer 3

Line

Question 4

A flat surface that has no thickness and extends forever in two dimensions.

Answer 4

Plane

Question 5

A point at the end of a segment of the starting point of a ray.

Answer 5

Endpoint

Question 6

A part of a line that starts at an endpoint and extends forever in one direction.

Answer 6

Ray

Question 7

A part of a line consisting of two endpoints and all points between them.

Answer 7

Line Segment

Question 8

A measure of length between two points and the shortest line segment that would connect them. Not defined until a unit of measurement has been chosen.

Answer 8

Distance

Question 9

Points that lie on the same line.

Answer 9

Col-linear

Question 10

Points and lines that lie in the same place.

Answer 10

Co-planar

Question 11

A statement that is accepted as true without proof.

Answer 11

Postulate

Question 12

Two segments that have the same length and dimensions.

Answer 12

Congruent

Question 13

Dividing a figure into two congruent parts.

Answer 13

Bisect

Question 14

The point of a segment that bisects the segment into two congruent segments.

Answer 14

Midpoint