A three sided figure

Have three angles

e.g.

or area= 45 meters squared

Here is some link to truelly understand how to finding the area of a triangle:

http://www.youtube.com/watch?v=xz6gBA0M9FY&feature=related

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## Monday, November 30, 2009

###
"Area of a Triangle"

## Wednesday, November 25, 2009

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Area

## Monday, November 23, 2009

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Angles

**Angles - space between 2 connecting lines**

**Acute **- an angle that is less than 90°

**Obtuse**- an angle that is greater than 90°and less than 180°**right- exact 90°**straight- 180°

## Wednesday, November 18, 2009

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How to make Perpendicular lines.

## Monday, November 16, 2009

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Geometry

**Parallel**-describes lines in the same plane that never cross or intersect.

**Perpendicular**-describes lines that intersect at right angles (90 degrees).

## Friday, November 6, 2009

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Term Test

## Thursday, November 5, 2009

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Number of the Day

## Wednesday, November 4, 2009

## Tuesday, November 3, 2009

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Scribe Post November 3, 2009

## Monday, November 2, 2009

Order of operations

There are four operations

-Multiplication,Division=brothers

-Addition,subtraction=sisters

1st: brackets

2nd:exponents

3rd:division or multiply in order form left to right

4th: addition or subtraction in order form left to right

6.4+120x1.25=158

2x3/6+(2-1)=2

Annie has been asked to calculate.1.7+6+2=. She claims the answer is 3.85. Do you agree?Explain why or why not.

Triangle

Triangle:

A three sided figure

Have three angles

e.g.

A three sided figure

Have three angles

e.g.

Because triangle is half of a square, rectangle, or a parallelogram, the formula for finding the area of triangle is Base x Height divided by two.

or area= 45 meters squared

Here is some link to truelly understand how to finding the area of a triangle:

http://www.youtube.com/watch?v=xz6gBA0M9FY&feature=related

or area= 45 meters squared

Here is some link to truelly understand how to finding the area of a triangle:

http://www.youtube.com/watch?v=xz6gBA0M9FY&feature=related

Areas - the number of square units contained in a two dimensional shape

this square has an area of 4 square units

Area is the surface space a shape takes up.

Area of square or rectangle

Length x Width= area

L x W= area

eg.

area=L x W

area= 6x3

=18cm2

Parallelogram - a four sided figure with opposite sides parallel and equal

eg.

Base(b) - a side of two-dimensional closed figure(shape)

Height(h) - the perpendicular distance from the base to the opposite side.

Base(b) is 5cm and height(h) is 3cm. Plug those value into the formula

A=b x h

A=5 x 3

A=15cm2

Find the area of this parallelogram

Find the area of this parallelogram

A=b x h

A=12 x 4

A=48m squared

Homework:

this square has an area of 4 square units

Area is the surface space a shape takes up.

Area of square or rectangle

Length x Width= area

L x W= area

eg.

area=L x W

area= 6x3

=18cm2

Parallelogram - a four sided figure with opposite sides parallel and equal

eg.

Base(b) - a side of two-dimensional closed figure(shape)

Height(h) - the perpendicular distance from the base to the opposite side.

Base(b) is 5cm and height(h) is 3cm. Plug those value into the formula

A=b x h

A=5 x 3

A=15cm2

Find the area of this parallelogram

Find the area of this parallelogram

A=b x h

A=12 x 4

A=48m squared

Homework:

angle bisector-the line that divides an angle into 2 equal parts

-equal angles are not mark with the same symbol

How to make an angle bisector

Method 1

1. use compass make an arc from the vertex that crosses both arms label them X and Y.

2. make an arc from point X and Y they must be equal size.

3. draw a line from point B to the arc intersection.

Method 2

1. use protractor measure the angle D,E,F .

2. divide your measurement by two.

3. make at 54 using protactor labelled Q

y) Join point Q with a straight line.

Bisect

Bi- means two

Sect- means to cut

So bisect means to cut in two.

Directions:

1. Draw a line

2. Fold so pt A is on top of pt B.

3. Use a ruler to draw a line in the crease made by the fold.

4. Label the point where the two lines segments intersect P.

5. Measure the lengths of AP and BP

What do you noticed?

7. Use a protractor to measure the 4 angles created.

What do you notice? they are all 90*

You have created a perpendicular bisector

- a line that divides another line segment in half and is at right angles to it.

-equal line segments are marked with " hash" marks.

use a right triangle

1. Find the length of the line segment.

2. Determine the half way point.

3. Use right triangle to create a perpendicular line.

3rd way to make a perpendicular bisector.

use compass.

step one: make an arc from point A is greater then half way.

step two: make an equal sized arc intersections with a straight line, that line is a perpendicular bisector.

Draw a 12cm line segment label it PQ. Draw the perpendicular bisector of this line segment, all three was. Label the point where they intersect R.

a. what are the lengths of PR and PR?

b. what does it mean if the lengths are different?

Bi- means two

Sect- means to cut

So bisect means to cut in two.

Directions:

1. Draw a line

2. Fold so pt A is on top of pt B.

3. Use a ruler to draw a line in the crease made by the fold.

4. Label the point where the two lines segments intersect P.

5. Measure the lengths of AP and BP

What do you noticed?

7. Use a protractor to measure the 4 angles created.

What do you notice? they are all 90*

You have created a perpendicular bisector

- a line that divides another line segment in half and is at right angles to it.

-equal line segments are marked with " hash" marks.

use a right triangle

1. Find the length of the line segment.

2. Determine the half way point.

3. Use right triangle to create a perpendicular line.

3rd way to make a perpendicular bisector.

use compass.

step one: make an arc from point A is greater then half way.

step two: make an equal sized arc intersections with a straight line, that line is a perpendicular bisector.

Draw a 12cm line segment label it PQ. Draw the perpendicular bisector of this line segment, all three was. Label the point where they intersect R.

a. what are the lengths of PR and PR?

b. what does it mean if the lengths are different?

-they are marked using arrows.

-they are marked using a small square.

**Measure the distance from:**

A to B = 8.9 cm

B to C = 8.9 cm

E to F = 8.9 cm

F to G = 8.9 cm

I to J = 8.9 cm

J to K = 8.9 cm

**What do you notice about parallel lines?**

Always are the same distance apart no matter where you measure as long as you measure using parallel lines.

**Identify any parallel line segments**

AE // BF

BF // CG

EI // FJ

FJ // GK

AI // CK

**Identify any perpendicular line segment**

AE to DF

BF to EG

CG to FH

IE to DF

**HOMEWORK!!**

1. Are line segments AC and DF parallel?

2. Are line segments DF and BE perpendicular?

3. Are line segments AC and BE perpendicular? How do you know?

4. Would a line segment joining A to D be parallel to a line segment BE? How do you know?

A reminder that we have a quiz on Tuesday, covering adding, subtracting, multiplying, and dividing decimals. Order of operations will be covered on the test as well.

Lastly, we have a Term Test on Thursday it will cover the entire term's worth of work. Be sure to start studying now, do not wait until the last minute!

Lastly, we have a Term Test on Thursday it will cover the entire term's worth of work. Be sure to start studying now, do not wait until the last minute!

Today's Number is : 8497.365.

Half of the number of the day is: 4248.6825.

Write the number of the day in expanded form: 8000+400+90+7+0.3+0.06+0.005=8497.365.

Write the number of the day in written form: eight thousand four hundred ninty-seven and three

hundred sixty-five thousandths.

Round the number of the day to 100: 8500.

What digit is in the tenths place: 3.

The number of the day doubled is:16994.730.

123.45 more than the number is: 8620.815.

987.65 less then the number is: 7509.715.

Cube the digit in the ones place: 7 times 7 times 7 = 343.

Square the digit in the hundreds place: 4 times 4 = 16.

Divide the number by 3.55 and round to the nearest hundredth: 2393.62.

The product of all the digits in the number of the day is: 8 times 4 times 9 times 7 times 0.3 times 0.06 times 0.005= .181440.

Homework

p.g 71-73 # 4 - 24 even only.

DON"T FORGET!!!!

QUIZ ON TUESDAY AND TEST ON THURSDAY

so study, study, sudy!!!!!!!!

Half of the number of the day is: 4248.6825.

Write the number of the day in expanded form: 8000+400+90+7+0.3+0.06+0.005=8497.365.

Write the number of the day in written form: eight thousand four hundred ninty-seven and three

hundred sixty-five thousandths.

Round the number of the day to 100: 8500.

What digit is in the tenths place: 3.

The number of the day doubled is:16994.730.

123.45 more than the number is: 8620.815.

987.65 less then the number is: 7509.715.

Cube the digit in the ones place: 7 times 7 times 7 = 343.

Square the digit in the hundreds place: 4 times 4 = 16.

Divide the number by 3.55 and round to the nearest hundredth: 2393.62.

The product of all the digits in the number of the day is: 8 times 4 times 9 times 7 times 0.3 times 0.06 times 0.005= .181440.

Homework

p.g 71-73 # 4 - 24 even only.

DON"T FORGET!!!!

QUIZ ON TUESDAY AND TEST ON THURSDAY

so study, study, sudy!!!!!!!!

What we did today;

We had to use BEDMAS to explain these equations

BEDMAS means :

Brackets

Exponents

Division

Multiplication

Addition

Subtraction

A)

2+3x4=

2+12

= 14

B)

10-6/2=

C)

(2+3)x4=

5x4

=20

D)

(10-6)/2=

4/2

=2

E)

8/2²=

8/4

=2

F)

4x3/2+5=

12/2+5

6+5

= 11

G) Create a math equation including +,-,/,x, exponents, and brackets. The answer must be 6 and you can't repeat any digits or use zero.

(8/4) x1²+9-5

2x1+9-5

2+9-5

11-5

= 6

Here is a video to help you with BEDMAS and a link to help you understand BEDMAS:

BEDMAS

We had to use BEDMAS to explain these equations

BEDMAS means :

Brackets

Exponents

Division

Multiplication

Addition

Subtraction

A)

2+3x4=

2+12

= 14

B)

10-6/2=

10-3

=7C)

(2+3)x4=

5x4

=20

D)

(10-6)/2=

4/2

=2

E)

8/2²=

8/4

=2

F)

4x3/2+5=

12/2+5

6+5

= 11

G) Create a math equation including +,-,/,x, exponents, and brackets. The answer must be 6 and you can't repeat any digits or use zero.

(8/4) x1²+9-5

2x1+9-5

2+9-5

11-5

= 6

Here is a video to help you with BEDMAS and a link to help you understand BEDMAS:

BEDMAS

There are four operations

-Multiplication,Division=brothers

-Addition,subtraction=sisters

1st: brackets

2nd:exponents

3rd:division or multiply in order form left to right

4th: addition or subtraction in order form left to right

6.4+120x1.25=158

2x3/6+(2-1)=2

Annie has been asked to calculate.1.7+6+2=. She claims the answer is 3.85. Do you agree?Explain why or why not.

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