Aeyra 260 Report post Posted March 19, 2011 Ohhhh. I accidentally for some dumb reason did the cylinder formula, and as I said, I did this in my head. How did I get the square root, I have no clue. It happens to all of us. Like in my county countdown round when I said 1 5/8 and it was express as a common fraction. A.K.A. 13/8. Yes they are equal, but only one is right. Quote Share this post Link to post Share on other sites
IdentityUnknown 216 Report post Posted March 20, 2011 ...Wow... Well, it's the boys' turn, so I guess I couldn't answer even if I did have the right answer (which I don't). Interesting question though. One problem: WHY IN THE WORLD WOULD WE NEED TO USE THOSE EQUATIONS?!!!! Sorry. I suck at Math. It's my least favorite subject. Quote Share this post Link to post Share on other sites
Aeyra 260 Report post Posted March 20, 2011 ...Wow... Well, it's the boys' turn, so I guess I couldn't answer even if I did have the right answer (which I don't). Interesting question though. One problem: WHY IN THE WORLD WOULD WE NEED TO USE THOSE EQUATIONS?!!!! Sorry. I suck at Math. It's my least favorite subject. So you can build stuff. Without math, we wouldn't be able to go into space, build cars, build buildings, create energy-efficient things, have computers, and a lot of things. Math is very important. (and very, very fun!) Quote Share this post Link to post Share on other sites
IdentityUnknown 216 Report post Posted March 20, 2011 So you can build stuff. Without math, we wouldn't be able to go into space, build cars, build buildings, create energy-efficient things, have computers, and a lot of things. Math is very important. (and very, very fun!) Ah...ok...I'm not very good at math (fine, I'm in advanced math, but I really am not a mathematician). Aeyra, I will never ever figure out the question you posted. At least I don't have to answer. Quote Share this post Link to post Share on other sites
Aeyra 260 Report post Posted March 20, 2011 Ah...ok...I'm not very good at math (fine, I'm in advanced math, but I really am not a mathematician). Aeyra, I will never ever figure out the question you posted. At least I don't have to answer. I see. We'll leave it up to some boy who actually feels like it then. Quote Share this post Link to post Share on other sites
IdentityUnknown 216 Report post Posted March 21, 2011 Good doggie! (sry, my dog that I just got is SO cute!) Quote Share this post Link to post Share on other sites
Aeyra 260 Report post Posted March 23, 2011 That was a little random. Is no boy up to the challenge? Quote Share this post Link to post Share on other sites
Misaki-chan 164 Report post Posted April 23, 2011 Since no one has answered in a month, I would take that as a "NO." Quote Share this post Link to post Share on other sites
hopes 237 Report post Posted April 23, 2011 What are we talking about? Am I interrupting something?? Quote Share this post Link to post Share on other sites
Aeyra 260 Report post Posted April 23, 2011 No, I challenged the boys to a semi-difficult MathCounts problem and they can't do it. Feel free to try to solve it (but don't give the answer to the boys!) Quote Share this post Link to post Share on other sites
Anti-APTX4869 181 Report post Posted April 23, 2011 umm am i missing the problem, or am i blind? =_= sorry i can't see computer screen in a dark room... (i ran out of lightbulb.. dam..) I love math. IT IS REQUIRED FOR SCIENCE (Physics/Chemistry/etc...) hmmm i should check the whole topic to search for the problem... Quote Share this post Link to post Share on other sites
Aeyra 260 Report post Posted April 23, 2011 umm am i missing the problem, or am i blind? =_= sorry i can't see computer screen in a dark room... (i ran out of lightbulb.. dam..) I love math. IT IS REQUIRED FOR SCIENCE (Physics/Chemistry/etc...) hmmm i should check the whole topic to search for the problem... It's a couple of pages back I think... Quote Share this post Link to post Share on other sites
Anti-APTX4869 181 Report post Posted April 24, 2011 ugh this is making my head crack lol... Been a while solving math problems like these. lesee.... 2 reg. Sq. Pyramid. = Octahedral Each edges = 12 cm... so.. here's what I did. Find the height ..|\..........Pythagorean theorem........ volume of pyramid .X|-\ 12 cm...6^2 + x^2 = 12^2........┌>. (1/3) (12^2)(6√3) ..|__\........36 + x^2 = 144..........ㅣ. 144(2√3) ...6cm........x^2 = 108...............ㅣ. 288√3 ..............x = √108 = 6√3-----------.. so.. volume of Octahedral is 576√3 cubic Centimeters ... i think i'm lost or missing a step. Quote Share this post Link to post Share on other sites
Anti-APTX4869 181 Report post Posted April 24, 2011 oh wait scratch that above that's wrong.. i forgot a step... =_= jeez i need to get back to my math brain again lol.. Quote Share this post Link to post Share on other sites
Anti-APTX4869 181 Report post Posted April 24, 2011 /facepalm.... the triangle makes 30-60-90 so i dont even have to do pythagorean in the first step,... so since the triangle is 6-x-12, it is 6-6√3-12, then to find the height, 6-x-6√3.... Height... 6√3 = √108, (√108)^2 = 108 36+x^2=108 <------------┘ x^2 = 72 x=√72 x=6√2 Volume of pyramid (1/3)(6√2)(144) =144(2√2) =288√2 Volume of Octahedral 2(288√2) =576√2 cm^3... Wait, HUH? What am I doing wrong? Quote Share this post Link to post Share on other sites
Anti-APTX4869 181 Report post Posted April 24, 2011 It's a couple of pages back I think... GAHHHH I DONT KNOW WHAT I'M DOING ANYMORE!!!! Quote Share this post Link to post Share on other sites
