Geometry Crossword Puzzle

3. a straight line extending from the center of a circle or sphere to the circumference or surface
7. elevation above sea level or above the earth's surface
8. a 90 degree angle
9. line that intersects a circle in two points
10. the length of the closed curve of a circle
12. two angles whose sum is 90 degrees
16. two line segments which cross to form 90 degree angles
17. the part of a straight line considered as originating at a point on the line and as extending in one direction from that point
19. a point that divides a segment into two congruent parts

1. a polygon with four sides
2. lines that have the same slope and will never intersect
4. the intersection point of two sides of a plane figure
5. an angle greater than 90 degrees but less than 180 degrees
6. a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end
11. one part of a line
12. lying in the same plane
13. Segment that connects two points on a circle
14. two angles whose sum is 180 degrees
15. a continuous portion of a circle
18. an angle less than 90 degrees but greater than 0 degrees
20. a triangle which has two sides equal