1. I) Simple Interest, 3/
HW: P.
Key Concepts!

4. Savings Interest – look for the best highest interest rate for investment of getting back more money on the amount initially invested into your account.

7. Individual Open Ended:
Goal: Create a word problem involving simple interest. It may involve borrowing money or investing money.
*** Share with class.

8. Review Wrap Up on Interest, followed by a Daily Grade.

9. I. Percent of Change, 3/20 & 3/21
HW: Posted on Board for the Week
A. Key Concepts!

13. Find Percent of Change. Round to nearest whole percent
Find Percent of Change. Round to nearest whole percent. State % of increase or decrease
Original: 25
New: 60

14. Individual Practice from Textbook

15. I. Geometry (Angles & Lines), 3/21/19 & 3/22/19
HW:
A. Key Concepts!

16. Point Has no dimension Usually represented by a small dot A
The above is called point A. Note the point is represented with a capital letter.

18. Line Extend in one dimension.
Represented with straight line with two arrowheads to indicate that the line extends without end in two directions.
This is Line l, (using the lower case script letter) or symbolically we call it l A B
NOTICE: The arrowheads are in both directions on the symbol

19. Line Segment
Let’s look at the idea of a point in between two other points on a line. A B A B
Here is line AB, or recall symbolically
The line segment does not extend without end. It has endpoints, in this case A and B. The segment contains all the points on the line between A and B
This is segment
Notice the difference in the symbolic notation!

20. Ray Symbolized by Let’s look at a ray: A B
A is called the initial point
The initial point is always the first letter in naming a ray. Notice the difference in symbols from both a line and segment. A B
Ray AB extends in one direction without end.
Symbolized by

21. Angles
Rays are important because they help us define something very important in geometry…Angles!
An angle consists of two different rays that have the same initial point. The rays are sides of the angles. The initial point is called the vertex.
Notation: We denote an angle with three points and symbol. The middle point is always the vertex. We can also name the angle with just the vertex point. This angle can be denoted as:
vertex B
sides A C

22. Classifying Angles
Angles are classified as acute, right, obtuse, and straight, according to their measures. Angles have measures greater than 0° and less or equal to 180°. A A A A
Acute angle
0°< m A < 90°
Right angle
m A = 90°
Obtuse angle
90°< m A < 180°
Straight angle
m A = 180°

23. Measure Angles using a protractor.
Practice

24. II. Geometry Part 2: Special Pairs (Angles)
A. Key Concepts!

25. Adjacent angles are “side by side” and share a common ray.
15º
45º

26. These are examples of adjacent angles.
45º
80º
35º
55º
130º
50º
85º
20º

27. When 2 lines intersect, they make vertical angles.
75º
105º
105º
Opposite angles are congruent (equal).
75º

28. Supplementary angles add up to 180º.
40º
120º
60º
140º
Adjacent and Supplementary Angles
Supplementary Angles but not Adjacent

29. Complementary angles add up to 90º.
30º
40º
50º
60º
Adjacent and Complementary Angles
Complementary Angles but not Adjacent

30. Practice Time!

36. Wrap up, followed by a Daily Grade

37. III. Geometry Part 3: Triangles, Quadrilaterals, & Polygons.
A. Key Concepts!
1) Triangle – 3 sided polygon with 3 angles.
2) 3 types of triangles (classified by sides)
Equilateral triangle: A triangle with three congruent (equal) sides and three equal angles

38. Isosceles triangle: A triangle with at least two congruent (equal) sides

39. Isosceles triangle: A triangle with at least two congruent (equal) sides

40. 2) 3 types of triangles (classified by angles)
a. Right triangle – has 1 right angle
b. Acute triangle – has 3 acute angles
c. Obtuse triangle – has 1 obtuse angle

41. B) Interior Angles of a Triangle.
Interior angles: An interior angle (or internal angle) is an angle formed by two sides of a simple polygon that share an endpoint
Interior angles of a triangle always equal 180 degrees.

43. C) Quadrilaterals, 3/22/19 & 4/2/19
HW: Posted on board for the Week
Key Concepts!
1) Quadrilateral – 4 sided closed figure (polygon).
Types of Quadrilaterals—

44. Sides Sides Trapezium Kite 1 pair of parallel sides
Parallelogram
Rectangle
Square
Rhombus
Kite
1 pair of parallel sides
Sides
2 pairs of equal sides
2 pairs of parallel sides and opposite sides equal.
Sides
2 pairs of parallel sides and all sides equal.
2 pairs of parallel sides and opposite sides equal.
2 pairs of parallel sides and all sides equal.

45. Angles Angles Trapezium Kite One opposite pair of equal angles
Parallelogram
Rectangle
Square
Rhombus
Kite
Opposite angles are equal.
One opposite pair of equal angles
Angles
Angles
Opposite angles are equal.
All angles are right angles (90o)
All angles are right angles (90o)

46. Name
Sides
Angles
Diagonals
Worksheet 2

51. D) Polygons, 4/2/19 & 4/3/19 (Review for Test 4/5/19 – Geometry Unit)
HW: See Board for Weekly Homework
Key Concepts! (Just know the names and number of sides up to 10-- for each polygon)
1) Polygon – shape with many sides (closed figure).
a. Triangle – 3 sides
b. Quadrilateral – 4 sides
c. Pentagon – 5 sides
d. Hexagon – 6 sides
e. Heptagon – 7 sides
f. Octagon – 8 sides
g. Nonagon – 9 sides
h. Decagon – 10 sides