on topic
Rustier, 16 isn't THAT young... unless your clan is full of 30 year old geizers who need walking canes and anti-mid-life crisis medicine. If you are having fun with them then don't worry about them, but if it isn't fun and you aren't taken seriously then you should leave it. Fun is much greater than playing with old geizers who dont take you seriously. lol
Off-topic
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Originally Posted by Jetto
Waut..howd you get 40.something? Did I miss something?
I thought it was pi times radius squared or the diameter times pi..for the triang;e its l2*l2 and then you square root it..simple geometry?? Howd you get it for the cirrcle then? tell me im confuzed :(
Oh and for the topic..No ..it actually was pretty funnny in s2.
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*sigh* where's my calculator aka my CACKALACK... aha, there it is. I'm going to say this a little more detailed.
Let a=5, b=6, c=7, and angle c = angle opposite c, angle b = opposite b, etc.
Okay, start with the basics. To find the area of a circle, it's pi times radius², right? Now, we have somework to find what the radius value is. Now do this in this order...
Find the angles of the triangle using the law of cosines, c²=a²+b²-2ab*cos(angle c)... rearrange it to be cos(angle c) = (a²+b²-c²)/2ab. So it's cos(angle c) = (5²+6²-7²)/2(5)(6) = 12/60. Now, to find the angle itself, use cosine inverse to find it [if you don't know, arc cosine on a calculator looks like cos^-1, make sure it's in degree mode). In this case, arc cos(12/60) = 78.46304 degrees = angle c.
Now, this is all you need... no more angles. Now you need to find the area of the triangle next. There are seven formulas but with our info, the simplest would be this one: Area = a*b*sin(angle c)/2. Plug in everything... =5*6*sin(78.46304)/2 = 30*sin(78....)/2 = 14.69693841.
almost done. Listen, the center of the triangle is the center of the circle. now we have the triangle's area, we use the radius formula: Radius = abc/4*(area of triangle). = 5*6*7/4(14.69693841)= 210/58.78775364. Radius of the circle equals 3.572172553.
Finally, we're back where we started... area of a circle = pi*r², so finally... pi * (3.572172553)² =
40.08803151 = area of the circle. And for kicks and giggles, the circumference of the circle = 2*pi*radius (or pi*diameter, whichever) = 22.444... dang, I'm good...
Okay, now stop breaking my balls. lol.