| A | B |
| ratio | the comparison of two quantities (example: the ratio of a and b is a:b or a/b) |
| significant digit | any non zero digit or any zero in a number that serves a purpose other than to locate a decimal point |
| similar figures | figures that are the same shape, have corresponding congruent angles, and have corresponding sides that are proportional in length |
| skew lines | lines that do not lie in the same place and do not intersect |
| solid figures | three dimensional figures that completely enclose a portion of space (examples: a rectangular prism, cube, sphere, cylinder, cone pyramid) |
| supplementary angles | two angles with measures the sum of which is exactly 180 degrees |
| surface area | the sum of the areas of the faces and any curved surfaces of a geometric solid |
| unit rate | a rate that has one unit as its second term |
| vertex | the point common to the two rays that form an angle; the point common to any two sides of a polygon; the point common to three or more edges of a 3-dimensional figure |
| volume | the amount of space occupied in three dimensions and expressed in cubic units |