| A | B |
|---|
 | Equilateral triangle |
 | Kite |
 | Obtuse triangle |
 | Complex polygon |
 | Concave polygon |
 | Convex polygon |
 | Rhombus |
 | Right triangle |
 | Isosceles triangle |
 | Trapezoid |
| 3-sided polygon with every angle less than 90 degrees | Acute Triangle |
| 3-sided polygon with no congruent sides | Scalene Triangle |
| In a triangle, a perpendicular line from a base to the opposite vertex | Altitude |
| A segment, other than a side, that connects 2 vertices of a polygon | Diagonal |
| Quadrilateral whose opposite sides are parallel | Parallelogram |
| Polygon with 4 sides and 4 right angles | Rectangle |
| Quadrilateral with 4 equal sides and 4 equal angles | Square |
