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Sucks so hard.
The bloody work just seems to pile up and pile up. Just finished a load around 15 minutes ago.
Why can't school just go away :(
The bloody work just seems to pile up and pile up. Just finished a load around 15 minutes ago.
Why can't school just go away :(
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But that wasnt a hard question, year 9 maths that is
Munn rules.
JFH wrote:
> munn wrote:
>
> But that's because I'm a genius.
>
> That's good because you won't mind helping me with some maths work.
> Ho do I work out the lengths of a right angle triangle when all I
> know is that the shortest side = x, the hypotenuse = x + 9, and the
> other one = x +/- 1? I'm sure it involves Pythagoras but I don't know
> how.
Well, first of all, if the shortest side = x, then the otehr side can't be x-1, as that's smaller than x
So, the three sides are x, (x+1) and (x+9)
Basically, pythogoras is A² + B² = C²
C² is the hypotenuse, therefore,
x² + x² + 2x + 1 = x² + 18x + 81
2x² + 2x + 1 = x² + 18x + 81
So, by subtraction of x² + 18x + 81
from each side, we get
x² - 16x - 80 = 0
and from that, you'd be able to deduce that:
(x+4)(x-20) = 0
Therefore x= -4 or x = 20
Since a trianglecan't have negative values, x must = 20
Therefore the sides of your triangles are:
20, 21, 29
Easy.
> munn wrote:
>
> But that's because I'm a genius.
>
> That's good because you won't mind helping me with some maths work.
> Ho do I work out the lengths of a right angle triangle when all I
> know is that the shortest side = x, the hypotenuse = x + 9, and the
> other one = x +/- 1? I'm sure it involves Pythagoras but I don't know
> how.
Well, first of all, if the shortest side = x, then the otehr side can't be x-1, as that's smaller than x
So, the three sides are x, (x+1) and (x+9)
Basically, pythogoras is A² + B² = C²
C² is the hypotenuse, therefore,
x² + x² + 2x + 1 = x² + 18x + 81
2x² + 2x + 1 = x² + 18x + 81
So, by subtraction of x² + 18x + 81
from each side, we get
x² - 16x - 80 = 0
and from that, you'd be able to deduce that:
(x+4)(x-20) = 0
Therefore x= -4 or x = 20
Since a trianglecan't have negative values, x must = 20
Therefore the sides of your triangles are:
20, 21, 29
Easy.
munn wrote:
> But that's because I'm a genius.
That's good because you won't mind helping me with some maths work. Ho do I work out the lengths of a right angle triangle when all I know is that the shortest side = x, the hypotenuse = x + 9, and the other one = x +/- 1? I'm sure it involves Pythagoras but I don't know how.
> But that's because I'm a genius.
That's good because you won't mind helping me with some maths work. Ho do I work out the lengths of a right angle triangle when all I know is that the shortest side = x, the hypotenuse = x + 9, and the other one = x +/- 1? I'm sure it involves Pythagoras but I don't know how.
I didn't studyfor my mocks or final exams and I still got A's/1's in pretty much everything.
But that's because I'm a genius.
But that's because I'm a genius.
Woo! Mocks!
I don't see why everyone is so terrified by them. I'l do terribly in the German one, but I should be fine for the rest... But it doesn't bother me too much.
I don't see why everyone is so terrified by them. I'l do terribly in the German one, but I should be fine for the rest... But it doesn't bother me too much.
Not Azul wrote:
> Speaking is easy.
Not if you don't have a tongue.
> Speaking is easy.
Not if you don't have a tongue.
Man im dreading the exams as well, especially english and german, mocks next week woooooo!
Speaking is easy.
Coursework has never been too much of a problem for me at GCSE, with the single exception of RS, as I've had to hand in my coursework at least three times because my idiotic teacher keeps losing it- come my lesson tomorrow morning, I won't be too surprised if I'm asked for it again. It's the exams that I dread- even though I only have mocks coming up, even the concept of spoken exams in German and French as a practice is horribly unpleasant.
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