Geometry Crossword puzzle

4. the number of cubic units in a 3D figure
5. The union of two rays with a common endpoint
6. A transformation that moves each point of a figure the same distance and in the same direction
9. The resulting figure after a transformation
12. angle that measures exactly 90 degrees
13. The original figure prior to a transformation
15. A parallelogram with four congruent sides
16. motion A transformation that preserves size and shape
17. a parallelogram
19. The point of concurrency of the medians of a triangle

1. an angle that measures less than 90 degrees
2. A line that intersects two or more coplanar lines in different points
3. a transformation in which a figure is flipped over a line, called a line of reflection
7. a line segment connecting the center of a circle with a point on the circle
8. A quadrilateral with exactly one pair of parallel sides
10. a change in the position, size, or orientation of a figure
11. A parallelogram with 4 right angles
14. angle whose measurements are more than 90 degrees and less than 180 degrees
15. A part of a line consisting of an endpoint and all points on one side of that endpoint
18. the ratio of the vertical change of a line to the horizontal change of the line