Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Ch. 9 Vocabulary
Pre-Algebra - Ch. 9
| Question | Answer |
|---|---|
| Point | a location in space that has no size |
| line | a series of points that extends in opposite directions without end |
| Plane | a flat surface with no thickness and extends without end in all directions |
| Line segment | a part of a line that has two endpoints |
| ray | a part of a line that has exactly one endpoint and extends without end in one direction |
| parallel lines | two lines that lie in the same plane and do not intersect |
| skew lines | lines that do not lie in the same plane, are not parallel and do not intersect |
| Adjacent angles | angles that share a vertex and a side but no points in their interiors |
| vertical angles | angles that are formed by two intersecting lines and are opposite each other. |
| Congruent angles | angles that have the same measure |
| Supplementary angles | angles whose sum is 180 degrees |
| Complementary angles | angles whose sum is 90 degrees |
| Transversal | a lines that intersects two other lines in different points |
| Corresponding angles | lie on the same side of the transversal in corresponding positions |
| alternate interior angles | angles in the interior of a pair of lines and on opposite sides of the transversal |
| polygon | a closed plane figure with at least three sides |
| acute triangle | triangle with three acute angles |
| right triangle | triangle with one right angle |
| obtuse triangle | triangle with one obtuse angle |
| equilateral triangle | triangle with three congruent sides |
| isosceles triangle | triangle with at least two congruent sides |
| scalene triangle | triangle with no congruent sides |
| quadrilateral | polygon with 4 sides |
| trapezoid | a quadrilateral with exactly one pair of parallel sides |
| parallelogram | quadrilateral with both pairs of opposite sides parallel |
| rectangle | a parallelogram with four 90 degree angles |
| square | a rectangle with four congruent sides |
| rhombus | a parallelogram with four congruent sides |
| regular polygon | a polygon where all sides and angles are congruent |
| circle | the set of all points in a plane that are the same distance from a given point |
| central angle | an angle whose vertex is the center of a circle |
| radius | a segment that has one endpoint at the center and the other endpoint on the circle |
| diameter | a chord that passes through the center of a circle |
| circumference | distance around a circle |
| chord | a segment whose endpoints are on the circle |
| congruent figures | figures that have the same shape and size, and their corresponding parts have equal measures |
| congruent angles | Angles that have the same measure |
| Acute angle | An angle with a measure less than 90 degrees |
| angle of rotation | the angle measure of the rotation |
| center of rotation | the fixed point which a figure rotates around |
| decagon | a figure with 10 sides |
| diagonal | a segment that connects two nonconsecutive vertices |
| heptagon | a seven sided figure |
| hexagon | a six sided figure |
| image | the result of the transformation of a point, line, or figure to a new set of coordinates |
| line of reflection | a line across which a figure is reflected |
| line of symmetry | a line that divides a figure with rotational symmetry into 2 congruent halves |
| nonagon | a nine sided figure |
| obtuse angle | an angle with a measure of more than 90 degrees but less than 180 degrees |
| octagon | an eight sided figure |
| pentagon | a five sided figure |
| perpendicular lines | lines that intersect and from a 90 degree angle |
| reflection | a transformation that flips a figure over a line of reflection |
| reflectional symmetry | when one half of a figure is a mirror image of the other half |
| right angle | an angle that measures 90 degrees |
| rotation | a transformation that turns a figure about a fixed point |
| rotational symmetry | when the figure can be rotated 180 degrees or less and match the original figure |
| straight angle | an angle with a measure of 180 degrees |
| transformation | a change of position or size of a figure |
| translation | a transformation that moves points the same distance and in the same direction |
| triangle | a three sided figure |
Created by:
unverferth
Popular Math sets