1. Good Morning  Please take out your flashcards.
Pick up scissors and glue if you need them.
You should have:
Words
Definitions
Pictures
Pink & Blue rectangles

2. A location with no shape or size.
Non-
Example
Point
A location with no shape or size.

3. Point
A point is represented by a capital letter.
Ex:

4. Non-
Example
Line
A straight object made up of points and has no thickness or width. Exactly one can go through any 2 points.

5. Line You can name a line by any two points on the line.
Always put a line above the two points with an arrow on both ends.
Ex: AB

6. Non- Example Picture Plane
A flat, two-dimensional surface that extends infinitely in all directions.

7. Plane You can name a plane by a capital letter.
Ex: P
Or by at least three points that do not all lie on the same line.
ABC

8. Points that lie on the same line.
Non-
Example
Picture
Collinear
Points that lie on the same line.

9. Points that lie in the same plane.
Non-
Example
Picture
Coplanar
Points that lie in the same plane.

10. Part of a line with two endpoints.
Non-
Example
Picture
Line Segment
Part of a line with two endpoints.

11. Line Segment You can name a segment by its two endpoints.
Always put a line above the two points (with no arrows)
Ex: AB

12. Non- Example Picture Ray
Part of a line that has one end point and extends indefinitely in one direction.

13. Ray
A ray is always named by it’s endpoint first and then another point on the ray.
Always put a line above the two points with an arrow on the right side only.
Ex: AB

14. Non- Example Picture Opposite Rays
Two rays which share an endpoint and extend indefinitely in opposite directions.

15. The space measured between two rays which share an endpoint.
Non-
Example
Picture
Angle
The space measured between two rays which share an endpoint.

16. Angle
An angle is formed by two rays with the same endpoint. The rays are the sides of the angle and the common endpoint is the vertex of the angle.
< TOX or
<XOT

17. An angle whose measure is 180 degrees
Non-
Example
Picture
Straight Angle
An angle whose measure is 180 degrees

18. An angle whose measure is less than 90 degrees
Non-
Example
Picture
Acute Angle
An angle whose measure is less than 90 degrees

19. An angle whose measure is greater than 90
Non-
Example
Picture
Obtuse Angle
An angle whose measure is greater than 90

20. An angle whose measure is 90 degrees
Non-
Example
Picture
Right Angle
An angle whose measure is 90 degrees

21. Non- Example Picture Adjacent Angle
Two angles which share a common side and vertex but have no common interior points (they do not overlap).

22. A point that divides a segment into two congruent segments.
Non-
Example
Picture
Midpoint
A point that divides a segment into two congruent segments.

23. Non- Example Picture Bisector
A point, line, ray, or segment that divides a segment or angle into two congruent pieces.

24. Non- Example Picture Linear Pair
A pair of adjacent angles with non-common sides that are opposite rays.

25. A pair of non-adjacent angles formed when two lines intersect.
Example
Picture
Vertical Angles
A pair of non-adjacent angles formed when two lines intersect.

26. Two angles with measures that have a sum of 90 degrees.
Non-
Example
Picture
Complementary Angles
Two angles with measures that have a sum of 90 degrees.

27. Two angles with measures that have a sum of 180 degrees.
Non-
Example
Picture
Supplementary Angles
Two angles with measures that have a sum of 180 degrees.