The curve is drawn from the end of the object that is closest to the object selection point.
Click Home tabDraw panelCurves drop-downCreate Curve From End Of ObjectFind.
Select the line or arc nearest the end to which the new tangent arc is to be attached.
Specify one of the following types of entries to use:
Point: Enter P and then specify the end of the chord. The curve is then drawn.
Radius: Enter R and then do one of the following:
Enter the radius at the prompt.
Enter A and enter a degree of curve.
Enter C and enter a degree of chord.
Note: When drawing a curve, specifying a positive radius or degree of curve draws the curve clockwise or to the right of the starting angle, whereas a negative radius or degree of curve draws the type curve counterclockwise or to the left.
After you enter the radius or degree of curve, the following prompt is displayed: