Tuesday, November 30, 2010
Thursday, November 18, 2010
a) 420 m. I added the length and width .
b) a²+ b²=c²
c) 420m-323.10= 97.10 m
Maria walked farther by 97.10 meters.
Wednesday, November 17, 2010
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
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:
Heres a game to help you:
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
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.
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 !
a.) 6 x 6 = 36
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.
13m2 does not equal 25m2
Correct me if i am wrong on anything.
Math homework book pages 30 - 31 (odd numbers)
1.) Pythagorean, Length, Hypotenuse, Legs
a.) it is 41 cm
b.) it is 37 m
a.) it is 3.3 cm
b.)it is 9.7 cm
a.) it is 4.5 m
b.) it is 17 m
Tell me what you think!
Do you agree?Or disagree?
each triangle? Give your answer to the
nearest tenth of a milimetre.
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.
I subtract c² and a² so that i can b².
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.
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
Tuesday, November 9, 2010
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.
Don't forget to comment and to do our homework for today! pages 99-100, # 1-22.
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. (:
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!
A)√64 √70 √81
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