| A | B |
| difference | the answer to a subtraction problem |
| even numbers | whole numbers that have 2, 3, 4, 8, or 0 in the one's place |
| line of symmetry | a line that divides a shape into 2 exactly alike parts |
| odd numbers | whole numbers that have 1, 3, 5, 7 or 9 in the one's place |
| sum | the answer to an addition problem |
| product | the answer to a multiplication problem |
| quotient | the answer to a division problem |
| multiple | the product of a given number and another whole number |
| estimate | a number close to an exact number |
| numerator | the top number of a fraction |
| denominator | the bottom number of a fraction |
| perimeter | the distance around a shape |
| area | the space covered by the inside of a shape (length times width) |
| polygon | a closed flat figure with straight lines |
| quadrilateral | a polygon with four sides |
| closed figure | a figure that begins and ends at the same point |
| circle | a flat round shape |
| parallel lines | lines that never cross and are always the same distance apart |
| trapezoid | a quadrilateral with one pair of parallel lines |
| parallelogram | a quadrilateral with two pairs of parallel lines |
| right angle | a 90 degree angle, shaped like a capital L |
| rectangle | a parallelogram with four right angles |
| square | a rectangle with 4 equal sides |
| pentagon | a polygon with five sides |
| hexagon | a polygon with six sides |
| octagon | a polygon with eight sides |
| triangle | a polygon with three sides |
| sphere | a solid figure with the shape of a round ball |
| cylinder | a solid figure shaped like a can |
| rectangular prism | a solid figure with six faces that are rectangles |
| cube | a solid figure with six faces that are squares |
| pyramid | a solid with a flat polygon base that comes to a point on top |
| cone | a solid with a circular base that comes to a point on top |
| congruent | figures that have the same size and shape |
| similar | figures that have the same shape but have different sizes |