Unit 2 and 3

2. angle an angle of 180 degrees
6. the set of all points in a plane that are the same distance from a given point(the center)
7. lines two lines that intersect to form right angles
9. the distance from one point on the circle to another point on the circle (not through the center)
10. part of a line that starts at one endpoint and extends forever in one direction
11. a quadrilateral with four right angles and four congruent sides
13. lines lines that cross at exactly one point
15. the distance across a circle through its center
16. segment a part of a line between two endpoints
17. triangle A triangle with three acute angles
18. angles two angles whose sum is 90 degrees
21. the distance from the center of a circle to any point on the circle; half the diameter
23. angle an angle greater than 180 degrees (but less than 360)
24. theorem a²+b²=c²
27. lines lines that never intersect
28. an exact location in space
29. triangle a triangle with two equal sides and two equal angles
31. a parallelogram with four congruent sides

1. triangle a triangle with one right angle
2. angles two angles whose sum is 180 degrees
3. a parallelogram with 4 right angles
4. triangle a triangle with no two sides of equal length
5. a four-sided polygon
8. A quadrilateral with two pairs of parallel sides
12. angle an angle whose vertex is the center of the circle
14. a quadrilateral with exactly one pair of parallel sides
19. a closed plane figure formed by three or more line segments
20. triangle a triangle with 3 congruent sides and angles; all angles measure 60 degrees
22. sum theorem the sum of the measures of the angles of a triangle is 180
25. the side of a right triangle opposite the right angle
26. triangle a triangle with one obtuse angle
30. curved line between two points