Geometry

2. a line that extends indefinitely in both ways
5. two rays or lines that share an endpoint
6. point where two rays or line segments meet to form an angle.
9. A closed four-sided figure with parallel opposite sides
11. The distance around a circle.
13. lines that would form a right angle if they crossed.
16. a location
17. triangle A triangle with three congruent sides.
18. A special type of rectangle that has equilateral (same length) sides and parallel opposite sides.

1. A closed figure with three sides
2. a line with an endpoint on each side
3. If two figures can be placed precisely over each other, they are said to be 'congruent' figures
4. a flat surface or area that extends infinitely in two dimensions and has no thickness
7. an endpoint and then it keeps going on forever
8. a round-shaped figure that has no corners or edges.
10. a line that splits an angle into two equal angles
12. a combination of three or more notes that blend harmoniously
13. If extended infinitely, the lines above will never meet.
14. lines that cross but do not make a right angle.
15. an angle less than 90 degrees