| A | B |
|---|
| Acute Angle | An Angle less than 90 degrees |
| Obtuse Angle | An angle more than 90 degrees and less than 190 degrees |
| Right Angle | An angle that is 90 degrees |
| Straight Angle | An angle that is 180 degrees |
| Reflex Angle | An angle that is more than 180 degrees. |
| Radius | A line drawn from the center of a circle to the outer edge. |
| Diameter | A line drawn through the center of a circle from one side of to the other side. |
| Verticle Angles | When you have a pair of intersecting lines, the angles that are across from eachother. |
| Adjacent Angles | Angles that are right next to eachther. |
| Equilateral Triangle | A triangle where all 3 sides are equal. |
| Isoceles Triangle | A triangle in which 2 or 3 sides are equal. |
| Scalene Triangle | A triangle in which no sides are equal. |
| Congruent | Exactly the same shape and size |
| Regular Polygon | Polygon in which all the sides are the same. |
| Tessellation | An arrangement of shapes that covers a surface completely without overlaps or gaps. |
| Tessellate | To make a tessellation; to tile. |
| Parallel | Never meeting and always the same distance apart. |
| Right Angle | A 90 degree angle |
| Perimeter | The distance around a closed 2-dimensional shape |
| Pentagon | A polygon with 5 sides |
| Kite | A quadrilateral with 2 pairs of adjacent equal sides. All sides cannot have the same length. |
| Parallelogram | A quadrilateral with 2 pairs of parallel sides. Opposite sides are congruent. |
| Polygon | A closed 2-dimenstional figure that is made ip of line segments joined end to end. The line segments cannot cross. |
