| Term | Definition |
| isosceles triangle | 2 sides the same length. |
| scalene triangle | no sides the same length. |
| equilateral triangle | all sides the same length. |
| regular pentagon | has all sides and angles congruent |
| right triangle | a triangle that has one right angle |
| complementary angles | 2 angles whose sum equals 90 degrees. |
| product | the results of multiplying two or more numbers |
| radius | a length that is mesured in square units |
| trapazoid | a quadrilateral with one pair of parallel sides |
| area | surface space that is mesured in square units |
| similar figures | figures that have the same shape but different sides |
| proportion | is two equal ratios |
| fraction | is a part out of a whole |
| decimal number | is a fraction written using point and a denomonator |
| congruent | mesures two corresponding sides are proportionaly |
| ratio | is a comparison of two quantities |
| quotient | the result of dividing one number by another |
| sum | the total of two or more numbers being added |
| pentagon | a polygon with five sides |
| equation | a mathmatical sentence that uses an equal sign |
| mode | the number that occurs most often |
| range | the difference between the large and the small number |
| medien | the middle number |
| mean | all the numbers added together then divided |