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Geometry unit
Math vocabulary for geometry unit.
Term | Definition |
---|---|
Figure | A two-dimensional or three-dimensional shape. |
Geometry | Mathematics that deals with points, lines, angles, and figures. |
Vertex | A point where two or more straight lines meet to form an angle. |
Plane | A flat surface that goes on forever in all directions. |
Right angle | An angle that measures exactly 90°, square corner. |
Three-dimensional shape | A solid figure with height, length , and width. |
Two dimensional shape | A plane figure with height and length. |
Solid | A figure with three dimensions with height, length, and width. |
Sphere | A three dimensional figure shaped like a ball. |
Square | A rectangle with four equal sides and four right angles. |
Symmetry | When a shape is exactly the same if you flip or turn it over a line. |
Cube | A three-dimensional shape that has six equal square faces. |
Edge | The line segment where to faces of a three-dimensional figure meet. |
Face | The flat surfaces of a three dimensional figure. |
Line of symmetry | An imaginary line drawn through a shape that divides the shape into halves that match. |
Polygon | A two-dimensional closed shape with straight sides. |
Quadrilateral | A two dimensional shape with four sides. |
Rectangle | A quadrilateral with four sides and four right angles (square corners). |
Rectangular prism | A rectangular three-dimensional figure. |
Side | One of the line segments that make a two dimensional shape. |