Question

1. choose the correct answer.

through any two points there is exactly one ____. (postulate 1.2a)
ray
space
line segment
line

1. through any three

exactly one plane. (postulate 1.2b)

1. if any two points lie on a plane, then the

those two points also lies on the
. (postulate 1

1. if two lines intersect, they intersect at exactly one ____ (postulate 1.2d)

ray
line
point

Explanation:

• For question 13: According to basic geometric postulates, through any two points there is exactly one line. A ray has a starting point and extends infinitely in one direction; space is a three - dimensional concept; a line segment has two endpoints.
• For question 16: When two lines intersect, by the nature of lines in a plane (in basic geometry), they intersect at exactly one point. A ray is a part of a line with a start - point and infinite extension in one direction, and a line is a set of points extending infinitely in both directions.

Answer:

1. line
2. point