Geometry

1. two lines that intersect to form right angles
2. Two or more lines that intersect at only one point
5. part of a line that consists of one endpoint and all the points of the line one side of the endpoint
7. the endpoint is the __________ of the angle
8. An angle that is between 90° and 180°
9. geometrical tool used to draw circles and parts of circles called arcs
10. ruler with no markings on it
12. A set of points that lie in a straight line
13. indicates a location and has no size
15. segment is a line, ray, or segment that is perpendicular to the segment at its midpoint
20. unit of angle measurements equal to 1 over 360
21. flat surface that extends without end and has no thickness
22. a 180 degree angle
24. segment is a point that divides the segment into two congruent segments
25. part of a line that consists of two endpoints and all points between them
26. straight path that extends in two opposite directions without end and has no thickness
27. formed by two rays with the same endpoint
28. two rays that share the same endpoint and form a line
31. A polygon that has one or more interior angles greater than 180°

1. A line is perpendicular to another if it meets or crosses it at right angles (90°)
3. Two objects are __________ if they both lie in the same plane
4. an instrument having a graduated arc for plotting or measuring angles
6. the real number that corresponds with the point two segments that have the same length
11. number of square units enclosed in a ploygon
14. the point, line, ray, or segment
16. A polygon that has all interior angles less than 180°
17. an angle that measure 90 degrees
18. set of points the figures have in common
19. sum of the lengths of a polygons side
23. a straight strip or cylinder of plastic, wood, metal, or other rigid material, typically marked at regular intervals, to draw straight lines or measure distances
29. an accepted state or fact
30. ordered set of numbers that define the position of a point
32. An angle with a measure between 0° and 90°