Saturday, January 21, 2012

Ghelo's Square Root Scribe Post

9.What are all the possible whole numbers that have a square root between 4 and 5?
14.Alex is thinking of a number. The number has a square root between 7 and 8 and is
a multiple of 12.
b.)Is there more than one answer? Explain. No there is no more answer possible because all the other numbers that are a multiple of twelve are rather lower than 49 or higher that 64.
Ex. 48 is below 49 and 72 is higher than 64

15. Order the following numbers from least to greatest : 7,46, 5.8,27, 6.3
√46 = 6.7 and 27= 5.1
5.1, 5.8, 6.3, 6.7, 7

Here is a are some links to help you with pythagoras !

SORRY I couldn't add colour it won't allow me !

Pythagoras Scribe Edit

1. Answer in a short paragraph and with diagrams
In a right triangle, a2 and b2 are the area of the legs' side length. The formula c2 = a2+b2 simply means that if you add the area of the square attached to the right triangle's legs, the sum equals the area of the square attached to the right triangle's hypotenuse. Also, if you square root the area of the square attached to the hypotenuse, you'll get the side length of c.

2. Solve for the missing side length.

12cm =a
5cm = b
?= c

a^2+b^2= c^2
144+25= c^2
c^2 = 169 cm^2
c = 13 cm

3. Is this a right triangle? Prove it!!!

a^2 = 8 cm
b^2= 6 cm
c^2= 11 cm
a^2 +b^2= c^2
8cm^2+6cm^2= 11cm^2
(8 times 8) + (6 times 6)= ( 11 times 11)
64+ 36=100
c^2 =100 NOT 121

No, this is not a perfect right triangle because a^2 + b^2 is not equal to c^2.

1 comment:

  1. Hey Ghelo! AWESOME JOB on your scribepost it was very helpful and clear to understand. Your pictures were very well done. Smart idea of putting mangahigh as one of your links why didn't I think of that? Your video I thought would help those who are still confused. And that's ok that you couldn't add color atleast you made some words bold and the others regular it still caught my attention so overall great job!