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Geometry Basics: Straight Lines and Their Parts

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Geometry Basics: Straight Lines and Their Parts

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Questions and Answers

What defines a straight line in geometry?

A straight line is determined by one point.

A straight line is a collection of infinitely many points in a single direction.

A straight line must have at least three distinct points.

A straight line is defined by two points. (correct)

How is a line segment represented in notation?

As $ar{AB}$ or line AB (correct)

As line AB only

As a straight line with arrows on both ends

As $ackslash$ AB

What indicates that a line extends infinitely in both directions?

The absence of endpoints

A dashed line segment

Points labeled at both ends

Arrowheads at both ends (correct)

Which statement correctly describes a ray?

<p>A ray has one endpoint and extends infinitely in one direction.</p> Signup and view all the answers

What are the endpoints of a line segment?

<p>The two points that limit the line segment</p> Signup and view all the answers

Study Notes

Straight Line Basics

A straight line is defined by two points and extends infinitely in both directions.
Arrowheads at the ends of a line indicate its infinite nature.
A line can be named using a small letter (e.g., line D) or by two points on the line (e.g., line AB, line BA).
A line is denoted using the symbol $\overleftrightarrow{AB}$ or $\overleftrightarrow{BA}$.

Parts of a Line

Line Segment: A portion of a straight line with a defined start and end point.
Endpoints: The two points that define the boundaries of a line segment.
Ray: Part of a straight line with a single endpoint that extends infinitely in one direction.
A ray is denoted by $\overrightarrow{AB}$, indicating an arrow starting at point A and extending towards point B.

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Description

This quiz explores the fundamental concepts of straight lines, including their definition, parts, and notations. Learn about line segments and rays, as well as how to identify and name them accurately. This foundational knowledge is essential for understanding geometry.