1. Unit 5 Vocabulary
The easiest thing to do is to plug in 1 and -1 (or 2 and -2)
if you get the same y, then it’s Even.
If you get the opposite y, then it’s Odd.
If you get different y’s, then it’s Neither.

2. Angle An angle measuring less than 90° but greater than 0°
The angle is

3. Circle
The set of points on a plane at a certain distance, or radius, from a single point, the center

4. Perpendicular Line Two lines that intersect at a right angle (90°).
Written as

5. Parallel Line
Lines in a plane that either do not share any points and never intersect, or share all points.
Written as

6. Line Segment
A line with two endpoints.
Written as

7. Point An exact position or location in a given plane.
Point A or Point B

8. Line
The set of points between points P and Q in a plane and the infinite number of points that continue beyond the points.
Written as

9. Distance along a line
The linear distance between two points on a given line.

10. Right Angle
An angle that measures 90°.

11. Acute Angle
An angle measuring less than 90° but greater than 0°.

12. Obtuse Angle
An angle measuring greater than 90° but less than 180°.

13. One-to-One
A relationship wherein each point in a set of points is mapped to exactly one other point.

14. Pre-image
The original figure before undergoing a transformation.

15. Image
The new, resulting figure after a transformation

16. Isometry
A transformation in which the preimage and image are congruent.

17. Every segment is congruent to its image.
Transformations are called RIGID if every image is congruent to its preimage.
Rigid transformations can also be referred to as an ISOMETRY.
Every segment is congruent to its image.

18. Which of the following are rigid transformations? (Isometry)

19. Isometries not only preserve lengths, but they preserve angle measures parallel lines, and betweenness of points

20. Find the value of each variable, given that the transformation is an isometry.

21. Congruent
Figures are congruent if they have the same shape, size, lines, and angles.

22. Similar Triangles
Triangles are similar if they have the same shape but have different sizes.