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You are not logged in. #1 20130919 09:33:27
Prisms and PyramidsI need help with a lot of these math problems. Not sure exactly how to get them. Just want help understanding how to get the answer: "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #2 20130919 12:06:54
Re: Prisms and PyramidsIt seems you get two equations with two variables. The eclipses from Algol (an eclipsing binary star) come further apart in time when the Earth is moving away from Algol and closer together in time when the Earth is moving towards Algol, thereby proving that the speed of light is variable and that Einstein's Special Theory of Relativity is wrong. #3 20130919 17:09:03
Re: Prisms and Pyramidshi demha The lateral area will require two calculations: and I don't know what is meant by the slant height for a prism. Let's sort the prisms out before going on to the pyramids. Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #4 20130919 19:04:39
Re: Prisms and PyramidsOk, from the link I understood how to get the area. So the base they give me is 6 as the base and the height is 8. So i have done: Last edited by demha (20130919 19:14:26) "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #5 20130919 19:39:36
Re: Prisms and Pyramidshi demha, You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #10 20130920 03:51:13
Re: Prisms and PyramidsI'm really confused now. I'm not sure which numbers to use in which equations to get the height & area. Last edited by demha (20130920 03:56:23) "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #11 20130920 08:34:31
Re: Prisms and PyramidsI've done some further researching and I think I am understanding it more now. First I need to get the area of the triangle shape. I believe that would be: "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #12 20130920 08:40:17
Re: Prisms and PyramidsOK. Let's say we have a prism which has an equilateral triangle for its base, side 4 cm, and it is 9 cm high. And the lateral area? and if the ends should be included (I'm not sure; you'll have to look at the possible answers) Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #13 20130920 08:57:26
Re: Prisms and PyramidsJust a quick questions, how does the first part (answer for the height) work out? I mean how did you get Last edited by demha (20130920 08:59:10) "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #14 20130920 16:27:56
Re: Prisms and PyramidsI have split the equilateral triangle in half so that there is a right angled triangle. The hypotenuse is 4 and one side is half that, ie 2 Now I can work out the area of the triangle.
??? That is exactly the method I am using. :) You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #15 20130920 19:08:32
Re: Prisms and PyramidsOk let me try it. "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #17 20130921 00:35:38
Re: Prisms and Pyramids2. a rectangular base with a width of 3 Last edited by demha (20130921 00:44:01) "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #18 20130921 01:46:06
Re: Prisms and Pyramidshi demha You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #19 20130921 02:29:49
Re: Prisms and Pyramids2. a rectangular base with a width of 3 "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #20 20130921 02:33:49
Re: Prisms and Pyramids(literally same as #2) Last edited by demha (20130921 07:50:58) "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #21 20130921 09:17:05
Re: Prisms and PyramidsThis is what I created for #5. Am I correct with this image? Last edited by demha (20130921 09:26:59) "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #22 20130921 17:38:01
Re: Prisms and Pyramidshi demha
Well the image upload worked so that's ok. You could have cropped some white space to save on the image size. If you're using Paint you can move the right and bottom borders in, then rotate the image 180 and shrink the other two borders. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #23 20130921 19:14:30
Re: Prisms and Pyramids5. the base is an isosceles triangle with a height of 8 and a base of 3 (sides of 6) "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln #24 20130921 20:45:57
Re: Prisms and PyramidsLook back to your diagram. The triangle has sides 6,6 and 3. Make a right angle by finding the midpoint of the base. The right angled triangle has sides of 6, 1.5 and h, where h is the height of the triangle. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #25 20130921 22:42:55
Re: Prisms and PyramidsOk I will use Pythagorean theorem to find the height. Last edited by demha (20130922 00:08:11) "The thing about quotes on the Internet is you cannot confirm their validity" ~Abraham Lincoln 