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Geometry Vocab
3rd Grade Geometry Vocab
Term | Definition |
---|---|
2- Dimensional Figure | The outline of a shape |
Square | A plane shape that has 4 equal sides |
Rectangle | A quadrilateral with 4 right angles. Opposite sides are equal length and parallel |
Quadrilateral | A shape that has 4 sides and 4 angles |
Rhombus | A parallelogram with 4 sides of the same size |
Rhombi | One Rhombus |
Trapezoid | A quadrilateral with exactly one pair of parallel sides. |
Vertices | The point where 2 rays meet and make an angle |
Acute Angle | an angle less than 90 degrees |
Right Angle | an angle that is exactly 90 degrees |
Obtuse Angle | an angle that is more than 90 degrees |
Hexagon | a polygon with 6 sides and 6 angles |
Octagon | - a polygon with 8 sides and 8 angles |
Pentagon | a polygon with 5 sides and 5 angles |
Triangle | a polygon with 3 sides and 3 angles |
Attributes | the characteristic of a shape |
Closed Figure | a shape that has all sides touching and no sides open |
Parallelogram | a quadrilateral that has both pairs of opposite sides parallel and equal in length |
Polygon | A closed 2-D figure formed of 3 or more straight sides that don’t cross. |
Congruent | the same size as another |
Parallel | The same distance apart from another. They will never cross. |