Question 1

How many endpoints does a line segment have?

Accepted Answer

A line segment has two fixed endpoints, which distinguishes it from a line (which has no endpoints) and a ray (which has only one endpoint).

Question 2

Which of the following has a starting point but no end point?

Accepted Answer

A ray has one starting point (its endpoint) and extends indefinitely in one direction, so it has no end point.

Question 3

How many lines can pass through a given single point?

Accepted Answer

An infinite number of lines can pass through a single given point in various directions.

Question 4

How many lines can pass through two distinct points?

Accepted Answer

Only one unique line can pass through two distinct given points.

Question 5

What do we call lines that intersect each other at right angles (90 degrees)?

Accepted Answer

Perpendicular lines are lines that intersect each other at an angle of 90 degrees.

Basic Geometrical Ideas