<![CDATA[Volume of revolution of an irregular shape]]>
https://help.geogebra.org/topic/volume-of-revolution-of-an-irregular-shape
Tue, 20 Sep 2016 05:42:24 +0000Sun, 18 Sep 2016 18:45:11 +0000Zend_Feed<![CDATA[hello I am not sure about your question. what parts you want? perhaps this pic help you saludos]]>
https://help.geogebra.org/topic/volume-of-revolution-of-an-irregular-shape#comment-203286
Sun, 18 Sep 2016 19:41:04 +0000<![CDATA[I should have been more specific. Well I am interested about the volume of many parts, in the attached doc: (Q1, O1, I1, H1, F1) or (T, D1, Q1, P1, N,L) And to be even more specific - I want to modify in the drawing and see how the volumes change. It is not a finished drawing, there are point and areas missing but I thought it is a good start.]]>
https://help.geogebra.org/topic/volume-of-revolution-of-an-irregular-shape#comment-203304
Mon, 19 Sep 2016 04:04:02 +0000<![CDATA[hello you can also to use an integral formula for each shape similar I said in first post example for (Q1, O1, I1, H1, F1) made with maxima being R=x(I_1)-x(F_1) this easier if you create the segment because R is the value of segment r=radius[d_3] h=y(L_1)-y(F_1) you can define a function f(x,y,z) like the screenshoot of maxima then f(R,r,h) says the volumen saludos saludos]]>
https://help.geogebra.org/topic/volume-of-revolution-of-an-irregular-shape#comment-203312
Mon, 19 Sep 2016 08:01:27 +0000<![CDATA[First of all - Thank you for your answer. It took me some time to answer you back cos I wanted to check what you wrote here. I do not believe that your integrate is correct but! But now I know that geogebra can not calculate the volume on its own. I made an integral - actually I made two to count the volume and it works - I used the maxima program as well, thanks for that too. I made the integrals on paper but I used geogebra to calculate the function of circle. (the center point of the radius is not at all obvious and very important) -->attached file Now I have to figure out the integral for the other volumes I want and put it in a dinamic geogebra file where I can modify the volumes. - Needle to say, I will be back as soon as I have time. :) Thanks!]]>
https://help.geogebra.org/topic/volume-of-revolution-of-an-irregular-shape#comment-203378
Mon, 19 Sep 2016 20:05:46 +0000<![CDATA[Try Pappus's Centroid Theorem used for this problem: https://www.geogebra.org/he... .]]>
https://help.geogebra.org/topic/volume-of-revolution-of-an-irregular-shape#comment-203388
Tue, 20 Sep 2016 05:42:24 +0000