| A | B |
|---|
| acute angle | less than 90 degrees (small) |
| area | the number of square units enclosed by a figure |
| average | mean |
| circumference | the distance around a circle |
| congruent | same size and shape; equal |
| denominator | the part of the fraction written below the line |
| diameter | the legnth of line segment through a circle |
| hexagon | a polygon with six sides |
| line graph | a graph made of lines |
| median | the middle number in a group of numbers |
| mode | the number that occurs most often |
| numerator | the part of the fraction written above the line |
| obtuse angle | an angle between 90 and 180 degrees |
| octagon | a polygon with eight sides |
| bar graph | a graph where information is measured in bars |
| parallel | lines in a plane that do not intersect |
| parallelogram | a quadrilateral with opposite sides parallel and congruent |
| pentagon | a polygon with five sides |
| perimeter | the distance around a figure |
| perpendicular | lines that intersect at right angles |
| polygon | one of a certain type of figure |
| quadrilateral | a polygon with four sides |
| radius | a line segment from the center of a circle to a point on that circle |
| regular polygon | a polygon with all sides congruent and all angles equal |
| rhombus | a parallelogram with four congruent sides |
| right angle | an angle that forms a square corner |
| sphere | a space figure with all points the same distance from the center; ball |
| symmetrical figure | a figure that has a line of symmetry |
| trapezoid | a quadrilateral with exactly one pair of parallel sides |
| volume | the number of cubic units needed to fill a space figure |
