Insert Arc Graphically (Three Points)
Enters an Arc graphically using the mouse by specifying 3 Points.
An arc is part of a circle. An Arc can be defined either by a) three points on its circumference, b) a center, a radius, two angles (starting and final angle) and its orientation, or c) by two points, a center, and a radius. Arcs can be entered either graphically using a cursor (most common) or using the New Arc dialog window. When entering a new arc or circle graphically, a user must select the command Insert->Domain Geometry->Arc->Graphically from the menu, or one of the following commands: (a) Arc by 3 Points, (b) Arc by two points and radius, or (c) Arc by Center, R, and Angle from the Insert Object part of the Domain Geometry version of the Tool Bar on the right side of the View Window, and then enter the arc using the cursor.
Once a command for defining a new arc using three points is selected, a cursor in the View Window will become a cross with a small empty circle in the middle. The coordinates of the location of the cursor will be displayed next to the cursor and on the Edit Bar, which will automatically change to the one displayed below. The Edit Bar will also show, which point and curve (their numbers) are being defined and what reference coordinate system (the current coordinate system, the grid origin, or the last inserted point) is used. The process of defining a new arc is ended by pressing the Esc keyboard button, the right mouse button (see the Help part of the Edit Bar), or clicking the Stop button on the Edit Bar.
An arc can be entered graphically using several ways:
All these ways lead to the creation of three definition points of an arc, whose indexes are displayed in the Edit Arc dialog window.