## Tuesday, November 30, 2010

## Thursday, November 18, 2010

### Kathryn's Homework 3,7,11

**3)**

ANSWER:

**a)**420 m. I added the length and width .

**b)**a²+ b²=c²

300²+120²=c²

(300X300)+(120X120)=c²

90000m²+14400m²=c²

104400m²=c²

√104400m²=c

323.10m=c

**c)**420m-323.10= 97.10 m

Maria walked farther by 97.10 meters.

**7)**

ANSWER :

a²=c²-b²

a²=80²-79²

a²=(80X80)-(79X79)

a²=6400cm²-6241cm²

a²=159cm²

a=√159cm²

a=12.61cm

**11)**

**LINKS:**

**VIDEO:**

PLEASE LET ME KNOW IF MISTAKES WERE MADE. THANK YOU:))

### AJ's Scribe Post

Questions 3,9,14.

3.

A)420m

120m+300m = 420m

B)323m

a²+b²=c²

120m²+300m²=c²

(120x120)+(300x300)=c²

104400m²= c²

√104400m²= c²

√323²= √c²

C) Maria walked further by 97m

9.

A)4.2cm

B)34cm

14.

15.6mm

## Wednesday, November 17, 2010

### Cameron's Homework Book Post: pg. 33 Numbers 6,7,8

I have chosen to do questions 6, 7, and 8 in the homework book on page 33.

6. The width of a rectangle is 8cm, and its diagonal is 17cm.

a) Calculate the length of the rectangle. Show your work!

c² - b² = a²

17² - 8² = a²

(17x17) - (8x8) = a²

289cm² - 64cm² = 225cm²

225cm² = c²

√225cm² = √c²

15cm² = c²

7. A quadrilateral has a width of 17cm and a length of 26cm. A diagonal is 31cm. Is the quadrilateral a rectangle? Justify your answer.

a² + b² = c²

26² + 17² = c²

(26x26) + (17x17) = c²

676cm² + 289cm² = 965cm²

965cm² = c²

√965cm² = √c²

31.06cm²

Answer: No, the corners do not meet at right angles because 17² + 26² ≠ 31²

8. A ship leaves port heading due west. After travelling at a speed of 20 km/h for 10h, the ship makes a 90 degree turn and heads south, travelling south for 7.5 h, how far is the ship from the port? Show your work.

20 km/h for 10h west equals 200km

20 km/h for 7.5h south equals 150km

200 km² + 150km²=?

40,000km + 22,500km = 62500km

✓62,500km = 250km²

Answer: The ship is 250km² away from the port.

Here is a video:

Heres a link:

http://www.mathsisfun.com/pythagoras.html

Heres a game to help you:

http://www.kidsnumbers.com/pythagorean-theorem-game.php

I'm sorry that their aren't any pictures, my computer won't let me put them on.

Hope this helps!

6. The width of a rectangle is 8cm, and its diagonal is 17cm.

a) Calculate the length of the rectangle. Show your work!

c² - b² = a²

17² - 8² = a²

(17x17) - (8x8) = a²

289cm² - 64cm² = 225cm²

225cm² = c²

√225cm² = √c²

15cm² = c²

7. A quadrilateral has a width of 17cm and a length of 26cm. A diagonal is 31cm. Is the quadrilateral a rectangle? Justify your answer.

a² + b² = c²

26² + 17² = c²

(26x26) + (17x17) = c²

676cm² + 289cm² = 965cm²

965cm² = c²

√965cm² = √c²

31.06cm²

Answer: No, the corners do not meet at right angles because 17² + 26² ≠ 31²

8. A ship leaves port heading due west. After travelling at a speed of 20 km/h for 10h, the ship makes a 90 degree turn and heads south, travelling south for 7.5 h, how far is the ship from the port? Show your work.

20 km/h for 10h west equals 200km

20 km/h for 7.5h south equals 150km

200 km² + 150km²=?

40,000km + 22,500km = 62500km

✓62,500km = 250km²

Answer: The ship is 250km² away from the port.

Here is a video:

Heres a link:

http://www.mathsisfun.com/pythagoras.html

Heres a game to help you:

http://www.kidsnumbers.com/pythagorean-theorem-game.php

I'm sorry that their aren't any pictures, my computer won't let me put them on.

Hope this helps!

## Tuesday, November 16, 2010

### Pythagoras Textbook Number 15

#15 The coordinate grid shown was drawn on centimetre grid paper. What is the length of line segment AB? Express your answer to the nearest tenth of a centimetre.

Answer:

I got 2 cm for side a and i got 4 cm for side b because i counted the units AB were taking up on the graph paper vertically and horizontally.

PS:

I know i wasn't assigned this scribe but Thessa didn't have the answer so I just wanted share what i got if people were curious about the answer.. I'm not exactly sure if I'm right but there you go (: sorry harbeck !

Link: http://www.mathsisfun.com/pythagoras.html

Video:

Answer:

I got 2 cm for side a and i got 4 cm for side b because i counted the units AB were taking up on the graph paper vertically and horizontally.

PS:

I know i wasn't assigned this scribe but Thessa didn't have the answer so I just wanted share what i got if people were curious about the answer.. I'm not exactly sure if I'm right but there you go (: sorry harbeck !

Link: http://www.mathsisfun.com/pythagoras.html

Video:

### Pythagoras Textbook Questions and Answers

5, 8, 11, and 14!

QUESTION #5: a) What is the area of each square attached to the legs of the right triangle?

b) What is the area of the square attached to the hypotenuse?

c) What is the length of the hypotenuse?

ANSWER:

a.) 6 x 6 = 36

The length of the hypotenuse is

ANSWER:

ANSWER:

a.) 6 x 6 = 36

8 x 8 = 64

b.)a² + b² = c²

6² + 8² = c²

( 6 x 6 ) + ( 8 x 8 ) = c x c

36 cm² + 64 cm² = c²

100 cm² = c²

The area of the square is 100 cm.

c.) √c² = √100 cm²

c = 10 cm

**10**cm.

QUESTION #8:

The side view of a

ramp at a grocery

store is in the shape of

a right triangle. Determine the length

of the ramp, to the nearest centimetre.

a² + b² = c²

50² + 200² = c²

( 50 x 50 ) + ( 200 + 200 ) = c x c

2500 cm² + 40 000 cm² = 42500 cm²

√42500 cm² = 206 cm

**QUESTION # 11:**The right triangle below has a square

attached to its hypotenuse. What is the

perimeter

of the triangle? Give your

answer to the nearest tenth of a centimetre.

**ANSWER:**

**√914 = 30.2**

a² + b² = c²

17² + b² = 30.2²

b² = 30.2 ² - 17²

b² = ( 30.2 x 30.2 ) - ( 17 x 17 )

b² = 912.04 cm² - 289 cm²

b² = 623.04

**√**b² =

**√623.04**

**b = 24.9**

The perimeter is

**72.1**m.

**QUESTION #14:**What are the lengths of b and c? Write your answer to the nearest tenth of a metre where

appropriate.

**ANSWER:**

**FIRST TRIANGLE:**

a² + b² = c²

3² + b² = 5²

b² = 5² - 3²

b² = ( 5 x 5 ) - ( 3 x 3 )

b² = 25 m² - 9 m²

b² = 16 m²

**√**b² =

**√**16m²

b = 4 m

**SECOND TRIANGLE:**

a² + b² = c²

6² + 4² = c²

( 6 x 6 ) + ( 4 x 4 ) = c x c

36 m² + 16 m² = 52 m²

**√**c² =

**√**52 m²

c = 7.2

HERE'S A VIDEO FOR YOU TO WATCH :)

HERE ARE SOME LINKS:

HOMEWORKS:

MATH TEXTBOOK. pg 104 - 105

MATH HOMEWORK BOOK pg. 30 - 31

IF I MADE A MISTAKE, PLEASE COMMENT BELOW AND CORRECT ME :)

### Home Work Booklet

P.30-31

#2,4,6,8

2.

A)C=35m2

B)C=42m2

4.

A)V=12cm2

B)Z=12cm2

6.

The height of the triangle is 10.2cm2

8.I think that the triangle is not a right triangle, because the legs don't equal the hypotenuse.

a2+b2=c2

2m2+3m2=52

(2x2)+(3x3)=(5x5)

4m2+9m2=13m2

13m2 does not equal 25m2

Correct me if i am wrong on anything.

#2,4,6,8

2.

A)C=35m2

B)C=42m2

4.

A)V=12cm2

B)Z=12cm2

6.

The height of the triangle is 10.2cm2

8.I think that the triangle is not a right triangle, because the legs don't equal the hypotenuse.

a2+b2=c2

2m2+3m2=52

(2x2)+(3x3)=(5x5)

4m2+9m2=13m2

13m2 does not equal 25m2

Correct me if i am wrong on anything.

### Justin Lorenzo's Math homework book Scribe Post

Our homework : math textbook pages 104 & 105, math homework book pages 30 - 31.

Math homework book pages 30 - 31 (odd numbers)

1.) Pythagorean, Length, Hypotenuse, Legs

3.)

a.) it is 41 cm

b.) it is 37 m

5.)

a.) it is 3.3 cm

b.)it is 9.7 cm

7.)

a.) it is 4.5 m

b.) it is 17 m

Tell me what you think!

Do you agree?Or disagree?

Math homework book pages 30 - 31 (odd numbers)

1.) Pythagorean, Length, Hypotenuse, Legs

3.)

a.) it is 41 cm

b.) it is 37 m

5.)

a.) it is 3.3 cm

b.)it is 9.7 cm

7.)

a.) it is 4.5 m

b.) it is 17 m

Tell me what you think!

Do you agree?Or disagree?

### Textbook work, pages 104-105

Heeeeeeey guys! I'll be figuring out the answers to number 7, 10, 13, and 15. If I had made a mistake, please correct me! Thank you :) Oh yeah, and if you can't see the picture that well, just click it!

7. What is the missing length of the leg for

each triangle? Give your answer to the

nearest tenth of a milimetre.

Answer:

10. What is the minimum distance the player

at third base has to throw the ball to get

the runner out at ﬁrst base? Express your

answer to the nearest tenth of a metre.

Answer:

### Pythagoras Scribe Post 5

I did numbers 6,9,12 and 15.

6.

a)

I subtract c² and a² so that i can b².

b)

I first squared the two numbers then subtract them. After that I find the square root of the difference then I got 10cm.

15.The coordinate grid shown was drawn on a centimetre grid paper. What is the length of the line segment AB. Express your answer to the nearest tenth of a centimetre.

http://www.mathsisfun.com/pythagoras.html

Here is a video to help.

6.

a)

I subtract c² and a² so that i can b².

b)

I first squared the two numbers then subtract them. After that I find the square root of the difference then I got 10cm.

12.The hypotenuse of the triangle cuts the circle in half.What is the diameter of the circle? express your answer to the nearest tenth of a centimetre.

15.The coordinate grid shown was drawn on a centimetre grid paper. What is the length of the line segment AB. Express your answer to the nearest tenth of a centimetre.

the square root of 6.32.

Here are some links.

http://www.mathsisfun.com/pythagoras.html

Here is a video to help.

**I'm not sure about my answer in no.15 but I think i'm wrong.****Leave comments and suggestions**## Wednesday, November 10, 2010

### Bennette's Square Root Scribe Post

QUESTION:

12. While shopping online, Ji Hun finds a square rug with an area of 11 m2. He needs to know if it will fit in his 4 m × 5 m bedroom.

a) Estimate the side length of the rug, to one decimal place.

b) Check your estimate with a calculator.

c) Will the rug fit? Explain.

ANSWERS:

a.) 3 x 3 = 9

4 x 4 = 16

9 is closer to 11. But in this question, they're looking for side length.

Since the side length of 9 is 3, we'll use 3 for our whole number.

c.) Yes, the rug will fit because the sides of the rug is smaller than the size of his room.

http://www.homeschoolmath.net/teaching/square-root-algorithm.php

12. While shopping online, Ji Hun finds a square rug with an area of 11 m2. He needs to know if it will fit in his 4 m × 5 m bedroom.

a) Estimate the side length of the rug, to one decimal place.

b) Check your estimate with a calculator.

c) Will the rug fit? Explain.

ANSWERS:

a.) 3 x 3 = 9

4 x 4 = 16

9 is closer to 11. But in this question, they're looking for side length.

Since the side length of 9 is 3, we'll use 3 for our whole number.

**3. ___**From Drop Box |

Now, we just need to find out one decimal to replace the blank. To find the answer to that, count the intervals between 9 and 11.

11 - 9 = 2

The estimated answer will be, 3.2 m

b.) By using my calculator, I multiplied 3.2 by itself to check it.

3.2 x 3.2 = 10.24

To find the whole number and one decimal place, use your calculator and find the square root of 11.

11 - 9 = 2

The estimated answer will be, 3.2 m

b.) By using my calculator, I multiplied 3.2 by itself to check it.

3.2 x 3.2 = 10.24

To find the whole number and one decimal place, use your calculator and find the square root of 11.

From Drop Box |

c.) Yes, the rug will fit because the sides of the rug is smaller than the size of his room.

**Here are some links to help you:**

http://www.homeschoolmath.net/teaching/square-root-algorithm.php

**Here are some math gaming sites for you to enjoy:**

Here are some videos for you to see:

PLEASE FEEL FREE TO GIVE SUGGESTIONS OR COMMENTS IF YOU SEE SOME ERRORS. I'LL MAKE CHANGES RIGHT AWAY :)

**HOMEWORK FOR TONIGHT:**

*PAGES: 99 - 100*

*Also do " COMMUNICATE IDEAS" on page 98.*

### Oops Bennette blew up her scribe post

## Tuesday, November 9, 2010

### Trish 's Square Root Scribe Post

**Pages 99-1, # 17**

**QUESTION :**

**Carmen wants to mount an 18 x18 cm square picture on a square board that is four times of the area of the picture.**

**a) What is the area of the picture?**

I answered

**324 cm**because when you

**square**18 it totals to

**324.**

**b) What is the area of the board?**

For now, I know that the board is 4 times the area of the picture, and so I multiplied

**324 to 4**and so the answer is

**1296**.

**c) What are the dimensions of the board?**

I answered

**36**because if you will find the square root of

**1296**the answer will be for sure

**36.**

If you're having trouble with finding the square root or having troubles with squaring a number, here our some links and videos to help you out.

http://http//www.ehow.com/how_4734274_square-square-root-number.html

http://http//www.math.com/students/calculators/source/square-root.htm

Don't forget to comment and to do our homework for today! pages 99-100, # 1-22.

### Tonie's Estimating Square Roots Scribe Post

Questions: 4 and 5

4.) Estimate the square root of each number, to one decimal place. Check with a calculator.

This is a link about how to estimate square roots.

Feel free to correct me. (:

4.) Estimate the square root of each number, to one decimal place. Check with a calculator.

a) 72 b) 103 c) 55

a)

c)

5. Estimate each value, to one decimal place. Check your answer with a calculator.

a) √14 b) √86 c)√136

b)

c)

Here's a video that talks about estimating square roots.

This is a link about how to estimate square roots.

Feel free to correct me. (:

### Justin Lorenzo's Text Book Scribe Post

Pages 98 - 100

# 15

The question is:

Order the following numbers from least to greatest:

7, v46, 5.8, v27, 6.3

To answer this type of question you would have to find the square root of 47, and also 27.

The square root of 46 is 6.7.

The square root of 27 is 5.17.

The order from least to greatest will be as shown:

v27, 5.8, 6.3, v46, 7.

If there is any type of error I have made please feel free to tell me!

# 15

The question is:

Order the following numbers from least to greatest:

7, v46, 5.8, v27, 6.3

To answer this type of question you would have to find the square root of 47, and also 27.

The square root of 46 is 6.7.

The square root of 27 is 5.17.

The order from least to greatest will be as shown:

v27, 5.8, 6.3, v46, 7.

If there is any type of error I have made please feel free to tell me!

### Justin Gacilan's Show You Know Pg.97

A) Identify a whole number with a square root between 8 and 9.

A)√64 √70 √81

8 9

B) How many whole numbers can you find that have a square root between 8 and 9? Show Your Work

I can find 16 whole numbers that have a square root between 8 and 9.

√64 - √65 √66 √67 √68 √69 √70 √71 √72 √73 √74 √75 √76 √77 √78 √79 √80 √81

A)√64 √70 √81

8 9

B) How many whole numbers can you find that have a square root between 8 and 9? Show Your Work

I can find 16 whole numbers that have a square root between 8 and 9.

√64 - √65 √66 √67 √68 √69 √70 √71 √72 √73 √74 √75 √76 √77 √78 √79 √80 √81

Labels:
JustinG8-17,
Scribe Post,
Show You Know,
Square roots

### Windy's Square Root Scribe Post

**The question is:**

Order the following numbers from least to greatest: 7, √46, 5.8, √27, 6.3

To do this you would find the square root of 46 and 27

The square root of 46 is 6.7

The square root of 27 is 5.19

The order would be: √27=5.19, 5.8, 6.3, √46,=6.7, 7

Link: http://www.mathsisfun.com/square-root.html

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