Geometry Flashcards for Grades 3-4

Overview

  • Grade Level: 4th Grade

  • Topic: Geometry

  • Number of Words: 26

Vocabulary Words

  1. Point

    • Definition: An exact location in space, typically represented by a dot.

    • Pronunciation: poynt

  2. Line

    • Definition: A straight path that extends infinitely in both directions with no width.

    • Pronunciation: lahyn

  3. Line Segment

    • Definition: A part of a line that has two endpoints.

    • Pronunciation: lahyn SEG-ment

  4. Ray

    • Definition: A part of a line that starts at an endpoint and extends infinitely in one direction.

    • Pronunciation: ray

  5. Angle

    • Definition: The space between two intersecting lines or rays, measured in degrees.

    • Pronunciation: ANG-guhl

  6. Right Angle

    • Definition: An angle that measures exactly 90 degrees.

    • Pronunciation: rahyt ANG-guhl

  7. Acute Angle

    • Definition: An angle that measures less than 90 degrees.

    • Pronunciation: uh-KYOOT ANG-guhl

  8. Obtuse Angle

    • Definition: An angle that measures more than 90 degrees but less than 180 degrees.

    • Pronunciation: ob-TOOS ANG-guhl

  9. Perpendicular Lines

    • Definition: Two lines that intersect to form a right angle.

    • Pronunciation: per-puhn-DIK-yuh-lar lahynz

  10. Parallel Lines

    • Definition: Two lines in the same plane that never intersect and are equidistant apart.

    • Pronunciation: PAR-uh-lel lahynz

  11. Quadrilateral

    • Definition: A polygon with four sides and four angles.

    • Pronunciation: kwod-ruh-LAT-er-uhl

  12. Triangle

    • Definition: A polygon with three sides and three angles.

    • Pronunciation: TRY-ang-guhl

  13. Rectangle

    • Definition: A quadrilateral with four right angles and opposite sides that are equal.

    • Pronunciation: REK-tang-guhl

  14. Square

    • Definition: A quadrilateral with four equal sides and four right angles.

    • Pronunciation: skwair

  15. Rhombus

    • Definition: A quadrilateral with all four sides of equal length but not necessarily right angles.

    • Pronunciation: ROM-buhs

  16. Parallelogram

    • Definition: A quadrilateral with opposite sides parallel and equal in length.

    • Pronunciation: par-uh-LEL-uh-gram

  17. Trapezoid

    • Definition: A quadrilateral with at least one pair of parallel sides.

    • Pronunciation: TRAP-uh-zoid

  18. Circle

    • Definition: A round shape where all points are equidistant from the center.

    • Pronunciation: SUR-kuhl

  19. Congruent

    • Definition: Figures or lines that are the same size and shape.

    • Pronunciation: kuhn-GROO-uhnt

  20. Vertex

    • Definition: The point where two lines meet to form an angle.

    • Pronunciation: VER-tex

  21. Polygon

    • Definition: A closed figure formed by a finite number of straight line segments.

    • Pronunciation: POL-i-gon

  22. Degrees

    • Definition: Units used to measure angles.

    • Pronunciation: di-GREEZ

  23. Intersect

    • Definition: To cross or meet at a point, as in lines or paths.

    • Pronunciation: in-ter-SEKT

  24. Plane Figure

    • Definition: A flat, two-dimensional shape that has length and width.

    • Pronunciation: pleyn FIG-yur

  25. Solid Figure

    • Definition: A three-dimensional shape that has length, width, and height.

    • Pronunciation: SOL-id FIG-yur

  26. Faces

    • Definition: The flat surfaces of a solid figure.

    • Pronunciation: FAYS-iz

  27. Edges

    • Definition: The line segments where two faces of a solid figure meet.

    • Pronunciation: EJ-iz

  28. Characteristics

    • Definition: Distinctive attributes or properties of shapes, such as the number of sides, angles, and faces in geometric figures.

    • Pronunciation: kar-ik-tuh-RIS-tiks