1. Geometry in the Real World Kristen Tegze P2

2. Point a zero-dimensional figure; while usually left undefined, has four main representations - the dot, the node, the location, and the ordered pair of numbers.

3. Line (Segment) A straight line which links two points without extending beyond them.

4. Plane A two-dimensional group of points that goes on infinitely in all directions; made up of infinite lines.

5. Angle A shape, formed by two lines or rays diverging from a common point (the vertex).

6. Perpendicular Lines A line is perpendicular to another if it meets or crosses it at right angles (90°).

7. Parallel Lines Lines are parallel if they lie in the same plane, and are the same distance apart over their entire length.

8. Triangle A closed figure consisting of three line segments linked end-to-end. A 3-sided polygon.

9. Right Triangle A triangle where one of its interior angles is a right angle (90 degrees).

10. Pentagon A number of coplanar line segments, each connected end to end to form a closed shape.

11. Hexagon A polygon with 6 sides.

12. Square A 4-sided regular polygon with all sides equal and all internal angles 90°.

13. Rectangle A 4-sided polygon where all interior angles are 90°.

14. Trapezoid A quadrilateral which has at least one pair of parallel sides.

15. Parallelogram A quadrilateral with both pairs of opposite sides parallel and equal in length.

16. Circle A line forming a closed loop, every point on which is a fixed distance from a center point.

17. Cylinder A Cylinder is a three-dimensional geometric figure that has two congruent and parallel bases.

18. Sphere A three-dimensional surface, all points of which are equidistant from a fixed point. A spherical object or figure.

19. Octagon A polygon with 8 sides.

20. Decagon A polygon with ten sides and ten angles.

21. Nonagon A nine-sided polygon.

22. All Done!!!!