Geometry: Lines and Angles Flashcards
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Questions and Answers

What is a point?

An exact location in space

What is a line?

A straight path of points that goes on and on in two directions

What is a line segment?

A part of a line that has two endpoints

What is a ray?

<p>A part of a line that has one endpoint and continues on and on in only one direction</p> Signup and view all the answers

What is an angle?

<p>Formed by two rays that have the same endpoint</p> Signup and view all the answers

What is a vertex?

<p>The point where two rays meet or where the sides of a polygon meet or where three or more edges of a solid figure meet</p> Signup and view all the answers

What is a right angle?

<p>An angle that forms a square corner at 90 degrees</p> Signup and view all the answers

What is an acute angle?

<p>An angle that is less than a right angle (less than 90 degrees)</p> Signup and view all the answers

What is an obtuse angle?

<p>An angle that is greater than a right angle (greater than 90 degrees)</p> Signup and view all the answers

What are parallel lines?

<p>In a plane, lines that never intersect</p> Signup and view all the answers

What are intersecting lines?

<p>Lines that pass through the same point</p> Signup and view all the answers

What are perpendicular lines?

<p>Two lines that intersect to form right angles</p> Signup and view all the answers

Study Notes

Points, Lines, and Angles

  • Point: Defines an exact location in space, often represented by a dot.
  • Line: A straight path extending infinitely in two opposite directions, composed of infinite points.
  • Line Segment: A portion of a line that has two distinct endpoints, unlike a full line.
  • Ray: A part of a line that starts at an endpoint and extends infinitely in one direction.

Angles

  • Angle: Created when two rays share a common endpoint, known as the vertex.
  • Vertex: The intersection point of two rays or the meeting point of polygon sides and edges in a solid figure.

Types of Angles

  • Right Angle: Measures exactly 90 degrees, forming a square corner.
  • Acute Angle: Measures less than 90 degrees, appearing sharp or narrow.
  • Obtuse Angle: Measures more than 90 degrees, appearing wider than a right angle.

Line Relationships

  • Parallel Lines: Never intersect in a plane, maintaining a constant distance apart.
  • Intersecting Lines: Two or more lines that cross at a single point.
  • Perpendicular Lines: Intersect at right angles, creating four 90-degree angles at the point of intersection.

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Description

Explore the fundamental concepts of lines, line segments, rays, and angles through this set of flashcards. Each card provides a clear definition and explanation of key geometry terms essential for a solid understanding of the subject. Perfect for students looking to reinforce their knowledge in geometry.

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