3 Lines

Draw a geometry circle tangent to three geometry lines which intersect.

This function allows you to draw a geometry circle of given radius tangential to three intersecting geometry lines, by indicating the three lines for the circle to be tangential to and the correct tangential circle from the options available.

Geometry lines are infinite lines that never print or plot, and are seen in all layers. To change the appearance of all geometry, see Geometry Settings under System Settings.  

Procedure

To draw a geometry circle of given radius tangential to three intersecting geometry lines:

1. Select Geometry ► Circles ► Tangent to ► 3 Lines, or click  the icon in the Geometry toolbar.

2. You are prompted to:

Indicate first geometry line

3. Position the cursor near the first geometry line to add the tangential circle to and press [Enter] or click to indicate the line. The line is highlighted.

4. You are prompted to:

Indicate second geometry line

5. Position the cursor near the second geometry line to add the tangential circle to and press [Enter] or click to indicate the line. The line is highlighted.

6.  You are prompted to:

Indicate third geometry line

7. Position the cursor near the third geometry line to add the tangential circle to and press [Enter] or click to indicate the line. The line is highlighted and the four tangential circle centre points are indicated. A rubberbanded preview of the circle is added to one of the centre points.

8. You are prompted to:

Indicate centre point of circle

9. The size of the circle updates automatically depending on which centre point is selected.

10. Position the cursor near the correct centre point and press [Enter] or click to select the point.

11. If the incorrect lines have been selected, right-click in the drawing area and select Cancel to return to the beginning and indicate the geometry lines again.

12. The function repeats.

13. Right-click and select Quit to end the function. Alternatively, press [Esc].