CAD Software Forum

Posted: **Thu Jan 18, 2007 10:19 am**

If I need to draw a cone that has a 1:8 ratio how do I figure out the angle?

Posted: **Thu Jan 18, 2007 3:44 pm**

tspco,

Two ways:

1) Using trigonometry:

Tan of the Angle = 8 / 1

Angle = ArcTan 8 / 1

Angle = 82.87 deg.

2) Use CAD:

Draw a line 8 units long in 'x' direction with a 1 unit in 'y' direction then type c to close which forms triangle.

Measure the angle

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Regards
John Finlay

Posted: **Thu Jan 18, 2007 5:43 pm**

I did the cad method thanks

Posted: **Fri Jan 19, 2007 6:30 pm**

I finally got back to my cone experiment, it appears that 1:8 is the same as 1.25:10, and the 1.25 is the widest part of the cone, the cone is only 1.40" long, the angle came out to about 7.125 degreew., Thanks John