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Math Vocab 51-113
Vocabulary 51-113
| Question | Answer |
|---|---|
| prime number | a number having exactly 2 factors; 1 and itself |
| composite number | number having more than two factors. Example: 6 is a composite number because its factors are 1,2, 3, and 6 |
| array | An arrangement of objects in rows and columns |
| perimeter | the distance around the OUTSIDE of a figure |
| area | the number of units needed to cover the INSIDE surface of a figure |
| Greatest common factor(GCF) | the greatest factor that two or more numbers have in common |
| least common multiple (LCM) | the least number other than zero, that is a common multiple of two or more numbers |
| geometry | the study of lines, points, planes, angles, and surfaces |
| point | an exact place or location in space represented by a dot labeled with a capital letter |
| endpoint | the point at the end of a line segment |
| line | a collection of points along a straight path that goes on forever |
| line segment | part of a line having 2 end points |
| parallel lines | lines extending in the same direction and are always the same distance apart |
| perpendicular lines | two lines or line segments that cross to form right angles |
| intersecting lines | lines that cross or meet |
| ray | a part of a line that has one endpoint |
| vertex | the comer point of an angle, polygon, or solid |
| angle | a figure formed by two rays that have a common endpoint |
| right angle | an angle measuring 90 degrees |
| acute angle | an angle measuring less than 90 degrees |
| obtuse angle | an angle measuring more than 90 and less than 180 degrees. |
| straight angle | an angle that measures 180 degrees |
| complementary angles | two angles whose measures have a sum of 90 degrees |
| supplementary angles | two angles whose measures have a sum of 180 degrees |
| protractor | a tool used for measuring or drawing angles |
| plane | a flat surface that goes on forever in all directions |
| intersecting planes | planes that intersect to form a line |
| similar | same shape, but not necessarily the same size |
| congruent | same size and shape |
| uni | 1 |
| bi | 2 |
| tri | 3 |
| quad | 4 |
| penta | 5 |
| hexa | 6 |
| hepta | 7 |
| octa | 8 |
| nona | 9 |
| deci/deca | 10 |
| centi | 100 |
| milli | 1000 |
| polygon | a closed figure formed by line segments |
| regular polygon | all sides and angles must be congruent within the shape |
| irregular polygon | all sides and angles are NOT congruent |
| diagonal | a line segment that joins two vertices of a polygon, but is not a side of a polygon |
| line of symmetry | a line along which you could fold a figure so both halves match |
| half-turn symmetry | if a figure matches itself exactly after a half turn about its center point, then it has half turn symmetry |
| rotational symmetry | if a figure is rotated less than 360 degrees around a central point and it still matches the original figure, then it has rotational symmetry |
| quadrilateral | a four sided polygon |
| square | a figure having four equal sides with four right angles |
| rectangle | a quadrilateral having four sided and four right angles |
| parallelogram | a quadrilateral with two sets of parallel sides |
| rhombus | a quadrilateral with four congruent sides |
| trapezoid | a quadrilateral with only one pair of parallel sides |
| triangle | a three sided figure |
| Triangles a classified by their _________ and __________. | sides, angles |
| equilateral triangle | a triangle with all congruent sides |
| isosceles triangle | a triangle with two congruent sides |
| scalene triangle | a triangle with NO congruent sides |
| right triangle | a triangle with a 90 degree angle |
| acute triangle | a triangle with 3 acute angles |
| obtuse triangle | a triangle with 1 obtuse angle |
| leg | in a right triangle, either of the two sides that form the right angle |
| hypotenuse | in a right triangle, the side opposite the right angle, it is the longest side in a right angle |
Created by:
abbycorrao
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