Geometry-related vocabulary from the Saxon Algebra 1 book.
Terms : Hide Images
| 625446475 | Quadrilateral | A polygon with four sides | |
| 625446477 | Parallelogram | A quadrilateral that has two pairs of parallel sides | |
| 625446479 | Trapezoid | A quadrilateral that has exactly two parallel sides | |
| 625446481 | Rectangle | A parallelogram with four right angles | |
| 625446483 | Rhombus | An equilateral parallelogram | |
| 625446485 | Square | A rhombus with four right angles or A parallelogram that is equilateral and equiangular | |
| 625446487 | Perpendicular | Two lines that make a square corner at the point of intersection (90⁰) | |
| 625446489 | Point of Intersection | The point where two lines cross. | |
| 625446491 | Right Angle | The angle made by perpendicular lines (90⁰) | |
| 625446493 | Straight Angle | Two right angles form a straight angle (180⁰) | |
| 625446495 | Acute Angle | An angle that is smaller than a right angle (<90⁰) | |
| 625446497 | Obtuse Anlge | An angle that is larger than a right angle and smaller than a straight angle (between 90⁰ and 180⁰) | |
| 625446500 | Vertex | The endpoint of each segment in a polygon (a corner) | |
| 625446501 | Triangle | 3-sided polygon | |
| 625446503 | Quadrilateral | 4-sided polygon | |
| 625446505 | Pentagon | 5-sided polygon | |
| 625446507 | Hexagon | 6-sided polygon | |
| 625446509 | Heptagon | 7-sided polygon | |
| 625446512 | Octagon | 8-sided polygon | |
| 625446514 | Nonagon | 9-sided polygon | |
| 625446516 | Decagon | 10-sided polygon | |
| 625446518 | Undecagon | 11-sided polygon | |
| 625446520 | Dodecagon | 12-sided polygon | |
| 625446523 | Concave Polygon | A polygon with an indentation (has an interior angle >180⁰) | |
| 625446525 | Convex Polygon | Any polygon that does not have an indentation (all interior angles are <180⁰). | |
| 625446527 | Equilateral Polygon | A polygon with all equal sides | |
| 625446529 | Equiangular Polygon | A polygon with all equal angle measures | |
| 625446531 | Regular Polygon | A polygon that is equilateral and equiangular | |
| 625446533 | Right Triangle | A triangle that has one right angle | |
| 625446535 | Acute Triangle | A triangle with three acute angles | |
| 625446537 | Obtuse Triangle | A triangle with one obtuse angle | |
| 625446539 | Equiangular Triangle | A triangle where all of the angles have the same measure of 60⁰. | |
| 625446541 | Isosceles Triangle | A triangle that has at least two sides of equal length | |
| 625446543 | Scalene Triangle | A triangle where all three sides have different measures | |
| 625446545 | Equilateral Triangle | A triangle where all three sides have the same length | |
| 625446547 | Perimeter | The distance around a geometric object (measured in units) | |
| 625446549 | Radius | The distance from the center of a circle to any point on the circle. | |
| 625446552 | Diameter | The radius of a circle times two | |
| 625446554 | Circumference | The perimeter of a circle (C=2πr) | |
| 625446556 | pi (π) | The exact number of times the diameter of a circle will go around the circle. Pi is an irrational number, but sometimes we use the approximation 3.14. |
