Alex Said:

i need help with math again?

We Answered:

I don't think the angles are in CM. So those are the sides. You just have to do the A^2 + B^2 = C^2

So sqrt(36+9)= 6.7 CM

Edwin Said:

Is homework really worth it?

We Answered:

To me, it really depends on the amount of homework being given. 2-4 hours of homework seems to be a little excessive, but I still think homework, in general, is in itself "worth it". Here's some of my own points, in "rambling style":

-You and some others in this thread complain about reading as homework. Unless you haven't seen the world today, being able to read and understand what you are reading is a big part of succeeding. Reading everyday gives you practice analyzing and evaluating different ideas--skills that American kids are becoming weaker and weaker at. You seem to like doing research to back up your arguments. Do yourself a favor and do some research on the importance of reading in education.

-Many say that doing these readings and notes by yourselves amounts to teaching yourselves. Well....surprise....that is what being an educated adult is: being able to teach yourselves how to do things on your own. What many students don't realize is that childhood will eventually end, and they won't always have an adult there to help them. Being able to teach yourself is one of the primary things that ALL schools should be teaching students, and homework is a glimpse of working independently....if you wait until college to learn how to do this, it's too late.

-Aside from content, homework teaches discipline. Discipline is doing something that you don't necessarily want or like to do; it's another trait of adulthood that must be learned. Many students today don't learn this discipline at home, and that is why one of the primary struggles teachers have in school today is trying to get students to do homework. Little or no discipline in adulthood = being fired from your job, not being able to pay bills, and begging me for a dollar in front of 7-11.

So again, homework gives students practice with reading and working independently, and teaches students the important skill of discipline. I'm not saying that 4 hours of homework is necessary, quantity-wise. In fact, I don't know what the magic number is for the "correct amount of homework". But if your question is "Is homework really worth it?" I say, yes.

Derrick Said:

Math Help!?!?!?!?

We Answered:

Hi

There is a pretty good website:

http://www.math.com/homeworkhelp/PreAlge…

which has step to step guides on how to do things and it has a unit quiz at the end of each topic. My brother used it to help him with his maths. I hope it helps!

Glenda Said:

Can someone explain to me how to do the Pythagorean Theorm?

We Answered:

the hypetonuse is the side opposite the right angle of a triangle

let c be the hypotenuse and let a and b be the legs of the triangle

a² + b² = c²

you will then get c² = some number and take the square root of that number and get
c = ±?that number

example

sides are 3 and 4 find the hypotenuse
a² + b² = c²
3² + 4² = c²
9 + 16 = c²
25 = c²
c = ?25
c = 5

so the hypetnouse would be 5

hope that helps

Stephanie Said:

Pythagorean Theorem - A couple of geometry problems?

We Answered:

a^2 + b^2 = c^2


1. Your "a" would be 14. Your "b" is x and your "c" is (x+2). Plug these into your pythagorean theorem..

14^2 + x^2 = (x+2)^2
196 + x^2 = (x+2)(x+2)
196 + x^2 = x^2 +4x + 4 (...expanded)
196 = 4x + 4 (subtracted x^2 from each side)
192 = 4x (subtracted 4 from each side)
48 = x (divided each side by 4)



4. "a" is 6, "b" is x, and "c" is 6.5

6^2 + x^2 = 6.5^2
36 + x^2 = 42.25
x^ 2 = 6.25
x = Sq.Rt. of 6.25

Jeffrey Said:

I need help on the james a garfield proof of the pythagorean theorem?

We Answered:

I copied - james a garfield "presidential proof" - from your question and got a hit on google. It seems to me that this proof is much like the classic geometric proof where you draw the triangle then arrange four of them a side to b side into a square. This means you have drawn the triangle four times. The square formed inside is c^2 and the outside square is (a+b)^2 = a^2 + 2ab +b^2 and since the area of a triangle is ab/2 then 2ab represents the area of the four triangles. which then says c^2 = a^2 + b^2