Here's the question you clicked on:
TryingToLearn.
Picture coming
|dw:1359811673287:dw| This trapezium spins around line CD. Count the coming figures volume? What shape/form does it get?? If I just knew that and how long the borders are I'd know how to count it.. I just don't understand what shape is it supposed to get?
|dw:1359812911995:dw|
Yeah but it's supposed to spin around the line CD. It's supposed to become some three-dimensional figure I think.
like this? |dw:1359814676128:dw|
to find the volume of the solid of revolution multiply the area by 2π
thank you so much :) It makes sense now!