Parabolic surfaces, 3D Figures

On the 3rd of March we learned to create parabolic surface and other 3D figures.

For creating a parabola we built 2 perpendicular axis and marked two spots - Vertex and Focus (which's distance from the vertical axis is twice in comparison with the distance between Vertex and the same axis.)

From the spot F we built concentric circles by offseting for one and the same number.

Then we drew lines keeping the same distance.

Using spline tool and the crossing points of the circles and lines we drew a parabola.
To build a surface with a thickness, we offseted the curve of parabola and added the edges.

We used Revsurf to build a parabolic surface from the parabolic curve and the axis.

And repeated it twice for the second parabolic line and the edge.

We can enter command Shade for better visualisation.

Using a horizontal axis we can create a different surface. In this case i used 3Drotate to change the position of the figure.

We can use the same technique for creating various shapes. This figure was built from the concentric circles and the Revsurf tool.But in this case I used less than 360 angle.

Using Revolve tool I created cone and a sphere.Extrusion can help to create different prisms and cylinder.

Link of the dwg file: https://drive.google.com/open?id=1tV7i7p0GW689O4BuKXcfZQeOT0JjjLiB

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