| A | B |
|---|
| point | exact location in space |
| ray | a line with one endpoint and another end that continues in one direction without end |
| line segment | a part of a line that includes 2 endpoints and all of the points between them |
| angle | a figure formed by 2 rays that have a common endpoint |
| plane | a flat surface that extends in all directions |
| perpendicular lines | 2 lines that intersect and form right angles |
| intersecting lines | lines that cross at exactly one point |
| polygon | plane figure formed by three or more line segments |
| parallelogram | quadrilateral with opposite sides that are parallel and congruent |
| rhombus | a parallelogram with four congruent sides |
| isosceles triangle | a triangle with 2 sides that have the same length |
| equilateral triangle | a triangle with sides that are all the same length |
| scalene triangle | a triangle with sides that are different lengths |
| chord | a line segment that connects 2 points on a curve |
| diameter | a line segment with both endpoints on a circle and that passes through the center |
| radius | the distance from the center of a circle to a point on a circle |
| right angle | measure of an angle that measures exactly 90 degrees |
| acute angle | measure less than 90 degrees |
| obtuse angle | measures greater than 90 degrees |
| straight angle | measures exactly 180 degrees |
| complementary angles | 2 angles that measure 90 degrees |
| supplmentary angles | angles that measure 180 degrees |
| congruent | same size and shape |
| decagon | polygon with 10 sides |
| pentagon | polygon with 5 sides |
| nonagon | polygon with 9 sides |
| heptagon | polygon with 7 sides |
| trapezoid | quadrilateral with one pair of parallel sides |
| dodecagon | polygon with 12 sides |
| circumference | distance around a circle |
| coordinate plane | a plane formed by 2 intersecting and perpendicular number lines called axes |
| y-axis | vertical number line on a coordinate plane |
| x-axis | horizontal line on a coordinate plane |
| quadrant | 4 parts of a coordinate plane |
| ordered pair | a pair of numbers used to locate a point on a coordinate plane |
| face | flat surface of a solid |
| sphere | solid figure that has the shape of a round ball |
| parallel lines | lines that never intersect and are in the same plane |
| arc | portion of the circumference of a circle |
| similar | same shape, different size |
| (0,0) | center of coordinate plane |
| roman numerals | quadrants are numbered using this |
