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Geometry (6) Vocab
6th Grade Geometry Vocab
| Term | Definition |
|---|---|
| triangle | a three-sided polygon |
| trapezoid | a quadrilateral with exactly one pair of parallel sides |
| rectangle | a parallelogram with four right angles |
| parallelogram | a quadrilateral whose opposite sides are both parallel and equal in length |
| area | the number of square units needed to cover a flat (2D) surface |
| base (of a 2D figure) | the side of a quadrilateral or triangle that is perpendicular to the height of the shape; in a trapezoid, the two parallel sides |
| height (of a 2D figure) | the distance from one base of a quadrilateral to another, or the distance from the point of the triangle to the base, forming a right angle |
| square units | a unit, measuring 1 unit by 1 unit, that is used in measuring area |
| composite shape | two or more combined figures that create a unified, single shape |
| decompose | to separate a shape into smaller shapes in order to find it's total area |
| net | a flat, two-dimensional model of a three-dimensional shape |
| cube | a regular solid having six congruent square faces |
| rectangular prism | a solid shape with two identical rectangle bases and all other faces are rectangles |
| triangular prism | a solid shape with two identical triangle bases and all other faces are rectangles |
| pyramid | a solid shape with one polygon base and all other faces are triangles that come to a point |
| vertex (vertices) | the point at which two edges, line segments, lines, or rays meet to form an angle |
| face(s) | a flat surface that is one side of a solid figure |
| edge(s) | a line segment created when two faces meet in a solid figure |
| surface area | the sum of the space covered by all the flat sides of a solid figure, measured in square units |
| volume | the amount of space inside a solid, 3-D figure |
| cubic units | the unit of measure for volume; 1 unit x 1 unit x 1 unit |
| linear units | a unit of measurement of length, perimeter, and circumference (ex. inches, feet, yards) |
| perimeter | the distance around the outside of a polygon or composite figure |
| square | a quadrilateral with 4 equal sides and 4 right angles |
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