| A | B |
|---|
| Vertical Angles | Are opposite angles and are always congruent |
| Adjacent angles | angles that are next to eachother and share a common side. |
| Complementary Angles | Angles that add up to 90 degrees |
| Supplementary Angles | Angles that add up to 180 degrees. |
| Alternating Interior Angles | Angles that are on the inside of the lines and are on the opposite sides of the transversal. When lines are parallel, these angles are congruent. |
| Alternating Exterior Angles | Angles that are on the outside of the lines and are on the opposite sides of the transversal. When lines are parallel, these angles are congruent. |
| Corresponding Angles | Angles that are in the same position, but on different lines. When lines are parallel, these angles are congruent |
| Quadrilateral | Any shape that has 4 sides |
| Parallelogram | A quadrilateral that always has two pairs of parallel sides and opposite sides are congruent |
| Square | A special type of parallelogram. All sides are congruent and all 4 angles are always 90 degrees |
| Rhombus | A special type of parallelogram. All sides are always congruent. All 4 angles can be 90 degrees, but they don't have to be |
| Rectangle | A special type of parallelogram. Opposite sides are always congruent. This shape always has 4 right angles |
| Trapezoid | Only has one pair of parallel lines |
| Polygon | Has straight sides and is closed in shape |
| Kite | This shape is not a parallelogram. It has 2 pairs of adjacent sides that are congruent |
| Isosceles Triangle | This triangle has 2 sides and 2 angles congruent |
| Scalene Triangle | This triangle doesn't have any angles or sides congruent |
| Equilateral Triangle | This triangle has all sides and all angles congruent |
| Acute Triangle | All three angles are acute |
| Obtuse Triangle | This triangle has one obtuse angle |
| Right Triangle | This triangle has one 90 degree angle |
