Construction Ellipse Bi-tangent to Circle, through Node

1. Call the Ellipse command.

2. Select a construction circle for the ellipse to be bi-tangent to. The center of the ellipse will coincide with the center of the circle. The length of the ellipse's first semi-axis will be equal to the radius of the circle. The orientation of the ellipse will depend on the second semi-axis, which is defined on the next step. A circle may be selected in one of the following ways:

•Move the cursor over the desired circle, using object snappings, and press or <Enter>.

•Activate the following automenu option:

If the option is activated via keyboard, then the construction circle nearest to cursor gets selected instantly.
If the option is activated via mouse, then you have to additionally press within drawing window for selecting the nearest circle.

3. Select a 2D node for the ellipse to pass through. The second semi-axis of the ellipse will connect such node with the the center of circle selected on the previous step. A node may be selected in one of the following ways:

•Move the cursor over the desired node, using object snappings, and press or <Enter>.

•Move the cursor over an intersection of construction lines or a characteristic point of a graphic line, using object snappings, and press or <Enter>. A connected 2D node will be created automatically at the specified point.

•Activate the following automenu option:

If the option is activated via keyboard, then the node nearest to cursor gets selected instantly.
If the option is activated via mouse, then you have to additionally press within drawing window for selecting the nearest node.

After creating an ellipse the command returns to the initial state.