September 17, 2009 (12)

Mr. Northcutt’s Math Classes1

Mr. Northcutt's Math ClassesClass Presentation

Math 1

9/16/2009

Math 2Transition Math

Transition Math – Daily Summary Announcements QUIZ: Section 1-1 thru 1-5 Wednesday.

Topic: Quiz Review Topic: Negative Numbers Number Line Ordering Numbers Absolute Value

ASSIGNMENT: EX 1-4: 1-27 ODD, 35-47 ODD, 52, 55, 62-65

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Number Line & Ordering Numbers Graphing on a Number Line

Graph 0, 2 and -6. Order the numbers from least to greatest and use

INEQUALITY SYMBOLS to show order.

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0 2 4 6-2-4-6

Negative Positive

"is less than""is less than or equal to"

<≤

"is greater than""is greater than or equal to"

>≥

Is 0 positive or negative?

ABSOLUTE ValueOPPOSITES: Numbers that are the same distance from 0 on the Number Line. EX: -4 and +4 are opposites.

ABSOLUTE VALUE: A number’s distance from zero on the number line.

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0 2 4 6-2-4-6

4 Units 4 Units

4 4 " ..."Absolute Value of= − =symbols words

ExamplesWhat is ABSOLUTE VALUE of…

COMPARE using <, = or >…

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0 8 15− 1.25−

2 6 2 6− − 2 2−

Math 1 – Daily Summary Announcements QUIZ: Sections 1.1 thru 1.4 on Monday

Topic: Subtracting Real Numbers (ℝ) Number Lines Tiles Rules

ASSIGNMENT: EX 1-5 (D1): 1-19 ODD, 52, 54, 68, 70

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HW Solutions EX 1-4 (D2): 22, 38, 40, 42, 56-59, 77, 78, 84, 94, 104

Go to PH Algebra Solutions...

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Number Lines

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0 2 4 6-2-4-6

4 7−

Algebra Tiles Distribute Algebra Tiles…

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3 ( 4)− −

2 ( 3)− − −

Subtraction Rules To subtract a number, add its opposite.

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3 53 ( 5)

2

−= + −= −

3 ( 5)3 58

− −= +=

3 114 12

3 114 129 11

12 12201253

− −

= +

= +

=

=

Math 2 – Daily Summary Announcements TEST: Chapter 1 on Tuesday!

Topic: Perimeter, Area and Circumference Square, Rectangle, Triangle & Circle

ASSIGNMENT: EX 1.7: 3, 5, 7, 9, 10d, 12, 18, 19, 21, 23, 27, 29, 32,

34, 42, 49, 50, 51

9/16/2009Mr. Northcutt’s Math Classes11

EX 1.6: 1e, 2e, 4, 7, 12, 13, 15, 18-23, 25d, 29, 32, 33-35, 37, 40de, 43, 47, 49, 53, 54

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1e. Polygon with n sides2e. Yes Convex; No Concave4e. No; Not a segment7.12. ;13. ;15. 818.19.20.21.22.

CQuadrilateral EquilateralQuadrilateral Equiangularin

AlwaysSometimesAlwaysNeverAlways

23.25 . See sketch29. 132. Convex

,33. ,34. ,

35. ,37.

49. 1,200,000 53.

40

15

. Discuss in class43. 8 47. 63,360

Neverd

Octagon RegularTriangle RegularQuadrilateralEquiangularOctagon RegularC

54. 13.9

Perimeter P, Area A, Circumference C

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Square with side length s Rectangle with length l and width w

Triangle with side lengths a, b and c, base b and height h

Circle with diameter d and radius r

2

4P sA s=

=

2 2P l wA lw= +=

12

P a b c

A bh

= + +

= 2

2C d rA r

π π

π

= =

=

Finding Perimeter & AreaFind the perimeter and area of a basketball court.

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50 ft

84 ft

Example (Multi-Step Problem)Find the perimeter and area of Triangle ABC with vertices A(1,2), B(4,6) and C(5,2).

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Example: Find Unknown LengthThe area of a triangle is 64 m2, and its height is 16 meters. Find the length of its base.

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