Geometry Crossword Puzzle

1. a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides
3. a plane figure with three straight sides and three angles
6. a four-sided plane rectilinear figure with opposite sides parallel
7. a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.
9. line segments never meet
11. a plane figure with four equal straight sides and four right angles
12. A dot
15. Line segments that are at right angles (90°) to each other.
17. a piece or part of a line having two endpoints
18. part of the circumference of a circle or other curve
19. When two or more lines meet at a common point

1. A solid (3-dimensional) object which has six faces that are rectangles
2. a half of a circle
4. a measure less than 90 degrees
5. a quadrilateral with only one pair of parallel sides
8. an angle of 90°
10. a straight line passing from side to side through the center of a circle
13. an angle exceeding 90 degrees but less than 180 degrees
14. a round plane figure
16. a plane figure with five straight sides and five angles