Geometry Vocabulary

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Across
  1. 2. A parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.
  2. 4. A quantity that expresses the extent of a two-dimensional figure or shape
  3. 5. A plane figure with three straight sides and three angles
  4. 8. A line meeting another at a right angle, or 90°
  5. 9. The lowest part or edge of something
  6. 10. A group of mathematical symbols that express a relationship or that are used to solve a problem
  7. 11. The outside limit of an object, area, or surface
  8. 13. A solid figure with many plane faces, typically more than six.
  9. 16. The branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs
  10. 17. A quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other
Down
  1. 1. The total area of the surface of a three-dimensional object
  2. 3. A four-sided plane rectilinear figure with opposite sides parallel.
  3. 5. A quadrilateral with only one pair of parallel sides
  4. 6. The common endpoint of two or more rays or line segments
  5. 7. The surface of a thing
  6. 12. Breaking It Down
  7. 14. A pattern that you can cut and fold to make a model of a solid shape
  8. 15. The amount of space that a substance or object occupies