Geometry Vocab

3. a quadrilateral with one pair of parallel sides
6. a line segment that has both endpoints on a circle
8. events that can never happen at the same time
10. set of points a fixed distance from a center and is defined by a central angle
12. a trigonometric function using the opposite leg of the hypotenuse
13. formed by two radii of a central angle and their endpoints on the circle
15. a rigid transformation that involves sliding a figure to a new location
17. the event in which the first event or second event (or both) occur
18. 2 pairs of adjacent sides congruent
19. the circle's perimeter
20. an angle in a circle with its vertex on the circle

1. a rigid transformation that involves turning an entire figure about a fixed point
2. a rigid transformation that involves flipping a figure over the line of reflection
4. the event in which both the first and second event occur
5. a quadrilateral with all sides of equal length
7. a straight line passing through the center of the circle
9. a point that divides a line segment into two parts of equal length
11. an angle in a circle with its vertex at the center of the circle
14. a straight line from the center to the circumference of the circle
16. when the outcome of one event does not influence the outcome of the other