| A | B |
|---|
| acute angle | an angle that measures between 0 degrees and 90 degrees |
| obtuse angle | an angle that measures between 90 degrees and 180 degrees |
| right angle | an angle that measures 90 degrees |
| adjacent angles | two coplaner angles that share a vertex |
| linear pair | two adjacent angles form a linear pair if their nonshared rays form a straight angle |
| perpendicular | two lines, planes, rays, or segments that intersect to form right angles |
| vertical angles | Non-adjacent, non overlapping angles formed by two intersecting lines |
| compliments | two angles whose measure adds up to 90 degrees |
| suppliments | two angles whose measure adds up to 180 degrees |
| triangle | a polygon with three sides |
| side of a triangle | a segment connecting two vertices |
| vertex of a triangle | the endpoint of a side of a triangle |
| right triangle | a triangle with a right angle |
| acute triangle | a triangle with three acute angles |
| obtuse triangle | a triangle with one obtuse angle |
| equilateral triangle | a triangle with three equil sides |
| isosceles triangle | a triangle with at least two congruent sides |
| scalene triangle | a triangle with no congruent sides |
| eqiangular triangle | a triangle whose angles are all congruent |
| polygon | a closed plane figure whose sides are segments that intersect only at their endpoints, with each segment intersecting intersecting exactly two other segments |
| quadrilateral | a polygon with four sides |
| pentagon | a polygon with five sides |
| hexagon | a polygon with six sides |
| regular | a polygon that is both equilateral and equiangular |
| consecutive angles | in a polygon, two angles that share a side |
| consecutive sides | in a polygon, two angles that share a side |
| diagonal | in a polygon, a segment that connects nonconsecutive vertices |
| parallelogram | a quadrilateral with both pairs of opposite sides parallel |
| rectangle | an equiangular parallelogram |
| rhombus | an equlateral parallelogram |
| square | a regular rectangle |
| prism | a three-dimentional figure with two congruent faces |
| base | the angle opposite the two congruent sides of a polygon |
| lateral face | side of a prism |
| vertex of a prism | point where faces meet |
| edge | line segment where faces meet |
| cube | a rectangular prism whose faces are all squares |
| net | a plane figure that can be folded to form a three-dimensional figure, such as a prism |
