OK, class, we are going to draw a cone (revolve feature). Now, follow closely to these instructions. This cone is going to be 7" long. Make the big end radius a dimension of .18". Make the small end radius a dimension of .12". Sometimes, we want to know what the angle will be (not included - just on the side). Go ahead and throw that angle dimension on there? What did you get? If you make the cone less than 7" long, you will probably get an angle dimension. If the cone is longer than 7", the dimension will probably not be an angle.
Is it just me or this a serious issue? Of course, there is a work-around. Make the cone 6" and then put the angle on there and then make the length grow accordingly. If we are not careful, this could bite someone!
arlan p.s. two glass houses. twenty stones. fourteen yellow. six are blue.