o.k., So it's been more years than I wish to count since I've been in
high school. :{P

Anyhow, since I have yet to get off my butt and go buy a decent high
school math book, I'll ask my math question here:

If you know the lengths of two sides of a triangle, what is the formula
to figure out the length of the third side?

ie,

Side A = 10 units
Side B = 7 units
Side C = ??

David

Post a reply to this message

Is it a right angle? if so it is A squared plus B squared equals C squared
where C is the side that connects at two non-right angles.

    |\
A  | \ C
    |__\
      B
David Heys <cel### [at] hotmailcom> wrote in message
news:37E12B7C.B029BC61@hotmail.com...
> o.k., So it's been more years than I wish to count since I've been in
> high school. :{P
>
> Anyhow, since I have yet to get off my butt and go buy a decent high
> school math book, I'll ask my math question here:
>
> If you know the lengths of two sides of a triangle, what is the formula
> to figure out the length of the third side?
>
> ie,
>
> Side A = 10 units
> Side B = 7 units
> Side C = ??
>
> David
>
>

Post a reply to this message

On Thu, 16 Sep 1999 09:40:13 -0800, David Heys wrote:
>o.k., So it's been more years than I wish to count since I've been in
>high school. :{P
>
>Anyhow, since I have yet to get off my butt and go buy a decent high
>school math book, I'll ask my math question here:
>
>If you know the lengths of two sides of a triangle, what is the formula
>to figure out the length of the third side?
>
>ie,
>
>Side A = 10 units
>Side B = 7 units
>Side C = ??

You don't have enough information.  The third side could be anywhere
from 3 to 17 units in length.  You need an angle, too.

Post a reply to this message

I don't know but I think C=7.... ha ha it could actually be most
anything based upon the angle of sides A and B.  The Pythagorean
Theorem is c2=a2+b2 for 90 degree right angles.  Other triangles may
vary  : )
Have a look at this: http://library.advanced.org/20991/geo/tri_i.html
and this:
http://argyll.epsb.edmonton.ab.ca/jreed/tlemath8/tledisk3/3202.htm

Bob

David Heys <cel### [at] hotmailcom> wrote in message
news:37E12B7C.B029BC61@hotmail.com...
> o.k., So it's been more years than I wish to count since I've been
in
> high school. :{P
>
> Anyhow, since I have yet to get off my butt and go buy a decent high
> school math book, I'll ask my math question here:
>
> If you know the lengths of two sides of a triangle, what is the
formula
> to figure out the length of the third side?
>
> ie,
>
> Side A = 10 units
> Side B = 7 units
> Side C = ??
>
> David
>
>

Post a reply to this message

Cool, o.k.,now I know it's more complex than I initially thought. THanks
for the formula for the 90 degree angled triangle Bill'n'Bob, and for the
links Bob. I'll check em in a minute. Funny the things we remember and the
things we forget. I remember that the three angles inside the triangle are
supposed to always add up to 180 degrees. Pythagorean Theorem rings big
bells in my head.

I think this weekend I'm really going to have to go out and get a good book
on high school math. For one thing, it'd answer a lot of these kinds of
questions. For another, I homeschool my kids, and my 7 year old is already
expressing interest in learning POV and I plan to use it to teach her math,
geometry, a touch of coding, etc..

Anyone else who wants to pipe in, or add in other nifty time saving
formula's (like I believe the circumference of a circle is supposed to be
equal to pi*(r^2)), please do. :{)

David

Post a reply to this message

David Heys wrote:
> 
> Anyone else who wants to pipe in, or add in other nifty time saving
> formula's (like I believe the circumference of a circle is supposed to be
> equal to pi*(r^2)), please do. :{)
> 
> David
	That's the surface :) Circumference is 2*pi*r...

		Jerome

-- 
*******************************

* they'll tell you what can't * mailto:ber### [at] inamecom
* be done and why...          * http://www.enst.fr/~jberger
* Then do it.                 *
*******************************

Post a reply to this message

On Thu, 16 Sep 1999 10:25:09 -0800, David Heys wrote:
>Anyone else who wants to pipe in, or add in other nifty time saving
>formula's (like I believe the circumference of a circle is supposed to be
>equal to pi*(r^2)), please do. :{)

There's the Cosine Theorem:

c=sqrt(a^2+b^2-2ab*cos(C))

for sides a and b and the angle between them C.  If C is 90 degrees, its 
cosine is zero and the formula simplifies to the Pythagorean Theorem.

Post a reply to this message

David Heys wrote:

> I think this weekend I'm really going to have to go out and get a good book
> on high school math. For one thing, it'd answer a lot of these kinds of
> questions. For another, I homeschool my kids, and my 7 year old is already
> expressing interest in learning POV and I plan to use it to teach her math,
> geometry, a touch of coding, etc..
> 
> Anyone else who wants to pipe in, or add in other nifty time saving
> formula's (like I believe the circumference of a circle is supposed to be
> equal to pi*(r^2)), please do. :{)
> 
> David

Also take a trip to my links page. I have an entire section devoted to math
and geometry sites with info online.

-- 
Ken Tyler

See my 1000+ Povray and 3D Rendering and Raytracing Links at:
http://home.pacbell.net/tylereng/index.html

Post a reply to this message

Here's your solution in a Java applet:
http://www.math.clemson.edu/~rsimms/triangle/triangle_with_figure.html
It's great, just discovered it.  You might have to do some rounding
off and use rescaled numbers for the side lengths but it's fabulously
good for just such a thing.

Bob

David Heys <cel### [at] hotmailcom> wrote in message
news:37E12B7C.B029BC61@hotmail.com...
> o.k., So it's been more years than I wish to count since I've been
in
> high school. :{P
>
> Anyhow, since I have yet to get off my butt and go buy a decent high
> school math book, I'll ask my math question here:
>
> If you know the lengths of two sides of a triangle, what is the
formula
> to figure out the length of the third side?
>
> ie,
>
> Side A = 10 units
> Side B = 7 units
> Side C = ??
>
> David
>
>

Post a reply to this message

Oh, that is really something!  How did you locate that app?

rc

Bob Hughes <inv### [at] aolcom> wrote in message
news:37e1436b@news.povray.org...
> Here's your solution in a Java applet:
> http://www.math.clemson.edu/~rsimms/triangle/triangle_with_figure.html
> It's great, just discovered it.  You might have to do some rounding
> off and use rescaled numbers for the side lengths but it's fabulously
> good for just such a thing.
>
> Bob
>
> David Heys <cel### [at] hotmailcom> wrote in message
> news:37E12B7C.B029BC61@hotmail.com...
> > o.k., So it's been more years than I wish to count since I've been
> in
> > high school. :{P
> >
> > Anyhow, since I have yet to get off my butt and go buy a decent high
> > school math book, I'll ask my math question here:
> >
> > If you know the lengths of two sides of a triangle, what is the
> formula
> > to figure out the length of the third side?
> >
> > ie,
> >
> > Side A = 10 units
> > Side B = 7 units
> > Side C = ??
> >
> > David
> >
> >
>
>

Post a reply to this message