| A | B |
|---|
| acute angle | an angle with a measure less than 90 degrees. |
| addend | any number that is being added |
| analog time | time displayed on a timepiece having hour and minute hands. |
| area | the measure,in square units,of the inside of a plane figure |
| array | a rectangular arrangement of objects in equal rows or columns |
| combination | a group of items.Putting these items in a different order does not make a new one of these. |
| cone | a solid figure that has a circular base and one vertex. |
| congruent | having the same size AND shape |
| cylinder | a three-dimensional figure with two circular bases, which are parallel and congruent. |
| edge | the surface where two faces of a solid figure meet. |
| equation | a statement that two mathematical expressions are equal. |
| equivalent | having the same value |
| expression | a variable, or any combination of numbers, variables, and symbols that represent a mathematical relationship. |
| face | a plane figure that serves as one side of a solid figure. |
| fact family | a set of related addition and subtraction or multiplication and division equations using the same numbers. |
| factor | a whole number that divides evenly into another whole number |
| function | a relation in which every input value has a unique output value. |
| hexagon | a polygon with six sides |
| cube | a rectangular solid having six congruent square faces |
| inequality | a mathematical sentence that contains a symbol that shows the terms on either side of the symbol are unequal. |
| line | a straight path extending in both directions with no endpoints |
| line of symmetry | a line that divides a figure into two halves that are a mirror image of each other |
| line segment | a part of a line with two endpoints |
| mean (average) | the number found by dividing the sum of a set of numbers by the number of addends |
| median | the middle number in an ordered set of data or the average of the two middle numbers when the set has two middle numbers |
| mode | the number(s) that occurs most often in a set of data |
| multiples | the product of a given whole number and another whole number |
| number sentence | an equation or inequality with numbers |
| obtuse angle | an angle with a measure more than 90 degrees |
| octagon | a polygon with eight sides |
| ordered pair | a pair of numbers used to locate a point on a coordinate grid. |
| parallel lines | lines that never intersect and are always the same distance apart |
| parallelogram | a quadrilateral whose opposite sides are parallel and congruent |
| pentagon | a polygon with five sides |
| perimeter | the distance around a figure |
| perpendicular lines | two lines, segments or rays that intersect to form right angles |
| pictograph | a graph that uses pictures to show and compare information |
| pyramid | a solid figure with a polygon base and triangular sides that meet at a single point |
| quadrilateral | a polygon with four sides |
| ray | a part of a line that has one endpoint and continues without end in one direction |
| rectangular prism | a solid figure in which all six faces are rectangles |
| reflection (flip) | a transformation that produces the mirror image of the figure |
| rhombus | a parallelogram with four equal sides |
| right angle | an angle that measures exactly 90 degrees. |
| right triangle | a triangle that has a 90 degree angle. |
| rotation (turn) | a movement of a figure around a fixed point. |
| sphere | a solid figure that has all points the same distance from the center. |
| tally chart | a table that uses tally marks to record data. |
| translation (slide) | a movement of a figure to a new position without turning or flipping it. |
| trapezoid | a quadrilateral with exactly one pair of parallel sides. |
| vertex | a point where lines, rays, sides of a polygon or edges of a polyhedron meet. |
| volume | the amount of space (in cubic units) that a solid figure can hold. |
