1. Warm-Up (Do not write questions.)1.
Set up an equation/inequality to represent the situation
How many weeks did Luc have to save in order to afford his game system?
2. A ringtone app charges $10 a month for the service plus 25 cents for each ringtone downloaded. What is the equation that models the total fee?

2. Point An exact position or location in a given plane.
Is represented by a dot and named with a capital letter.
Point A or Point B

3. Agenda
Review Do Now
Lesson on Geometric Terminology

4. 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 Q P

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

6. Ray
A line that has one endpoint and continues on forever in the opposite direction. B C D E A

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

8. Angle
Made up of 2 rays joined together at a common point called a vertex.
The angle is

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

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

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

12. How far apart are the points on the line segment?

13. How far apart are the points on the line segment?
Hmmm…

14. Degrees
The unit of measure for angles.

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

16. Right Angle
An angle that measures 90°.

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

18. Straight Angle
An angle measuring exactly 180°.

19. Adjacent Angles Two angles that share a common vertex and side.
SIDE BY SIDE

20. Vertical Angles
Two angles directly across from each other. They share a common vertex. h f e g

21. Linear Pair
Two adjacent angles that form a straight line. 1 2

22. Complementary Angles
Two angles that add up to 90 degrees. 1 2

23. Supplementary Angles
Two angles that add up to 180°. 1 2

24. Interior Angle = Inside AngleB C
Exterior Angle= Outside Angle

25. *Use your vocabulary to help you!
Guided Practice
*Use your vocabulary to help you!
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.

26. Line Symmetry
Line of Symmetry: The line where you could fold the image and have both halves match exactly. 

27. Examples

28. Guided Practice

29. Complete Independent Practice

30. Rotational Symmetry
Rotational Symmetry: If there is a center rotation less than 360 degrees where an object will look the same again
Order of Rotational Symmetry: The number of center rotation a figure can be rotated to, without bringing in any changes to the way it looks originally,

31. Video

32. Examples
Orders of rotational symmetry ______ Orders of rotational symmetry ______
Degrees of rotational symmetry _____ Degrees of rotational symmetry _____

33. Formula Rotational Symmetry
Formula: 360° / order of rotational symmetry
Example: triangle has 3 orders of rotational symmetry
The rotational symmetry : 360°/3 = 120°

34. Guided Practice
Square Orders of rotational symmetry __4___ Degrees of Rotational Symmetry:___90__
Pentagon Orders of rotational symmetry ___5__ Degrees of Rotational Symmetry:__72___
Hexagon Orders of rotational symmetry __6___ Degrees of Rotational Symmetry:__60___
Heptagon Orders of rotational symmetry ___7__ Degrees of Rotational Symmetry:__51.43___
Octagon Orders of rotational symmetry ___8__ Degrees of Rotational Symmetry:__45___

35. Complete Independent Practice

36. Exit Ticket
Does the figure above have line symmetry? If so, how many lines of symmetry does it have?
Does the figure above have rotational symmetry? If so, what is it’s order of rotation?
What do we call the set of points on a plane at a certain distance , or radius, from a single point, the center?