1.1 Points, Lines, & Planes

Question 1

Undefined Terms

Answer 1

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

Question 2

Point

Answer 2

names a location and has no dimension.

Question 3

line

Answer 3

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

Question 4

plane

Answer 4

flat surface, no thickness and extends forever in two dimensions.

Question 5

endpoint

Answer 5

point at an end of a segment or the starting point of a ray

Question 6

ray

Answer 6

part of a line that starts at an endpoint and extends forever In one direction

Question 7

line segment

Answer 7

part of a line consisting of 2 end points and all points between.

Question 8

distance

Answer 8

measure of length of the shortest line segment

Question 9

coplanar

Answer 9

lie on the same plane

Question 10

Postulate

Answer 10

a statement that is accepted as true without proof.

Question 11

collinear

Answer 11

lie on the same line

Question 12

Two Segments with the same length

Answer 12

Congruent

Question 13

bisect

Answer 13

divide into two congruent parts

Question 14

Midpoint

Answer 14

the point that bisects the segment into two congruent segments.