| A | B |
|---|
| Polygon | A plane, closed figure whose sides are formed by line segments |
| Triangle | A polygon with three (3) sides |
| Acute Triangle | A triangle where 2 sides are the same length |
| Right Triangle | A triangle where one angle= 90 degrees |
| Obtuse Triangle | A triangle where one angle is greater than 90 degrees and less than 180 degrees. |
| Equilateral Triangle | A triangle where all sides are the same length. |
| Isosceles Triangle | A triangle where 2 sides are the same length. |
| Scalene Triangle | A triangle where no sides are the same length |
| Similar Polygon | Polygons that have the same shape |
| Congruent Polygon | Polygons that have the same size and shape. |
| Quadrilateral | A polygon with four sides |
| Square | A quadrilateral with all sides the same length and four right angles |
| Rectangle | A quadrilateral with 4 right angles, but opposite sides are the same length |
| Parallelogram | A quadrilateral with opposite sides parallel and the opposite sides the same length |
| Rhombus | A quadrilateral with opposite sides parallel and all 4 sides the same length |
| Trapezoid | A quadrilateral with only 1 pair of parallel sides. |
| Line of Symmetry | A line on which a figure can be folded so that the two parts fit exactly. |
