| A | B |
|---|
| congruent | figures with the same shape and size |
| ordinal numbers | numbers that indicate a position |
| estimate | to mentally determine an approximate measure or calculation |
| perpendicular lines | intersecting lines that form a right angle |
| intersecting lines | lines that cross one another |
| parallel lines | lines that stay the same distance apart |
| probability | the likelihood that something will happen |
| right angle | a square corner that is 90 degrees |
| sum | the answer to an addition problem |
| product | the answer to a multiplication problem |
| array | a group of numbers arranged in order in a column or row, usually found on a number line |
| symmetry | the same in size, shape, positions of parts, on opposites sides of dividing line or center |
| face | one of the flat surfaces that bound a solid |
| set | the number of things of the same kind that belong together |
| attributes | a quality belonging to a thing, adjectives of that thing |
| flip | to turn to the other side |
| rotate | to turn on an axis |
| reflection | an image produced as seen in a mirror |
| difference | the amount that remains after one quantity is subtracted from another. |
| combinations | elements selected from a set without regard to the order of sequence |
