To create an arc, you can specify various combinations of center, endpoint, start point, radius, angle, chord length, and direction values. 
Draw the Arc in a Clockwise Direction
By default, arcs are drawn in a counterclockwise direction. Hold down the Ctrl key as you drag to draw in a clockwise direction. 
 Draw an Arc by Specifying Three Points 
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Click    .  Find .  Find
- Specify the start point. 
- Specify a point on the arc. 
- Specify the endpoint. 
Draw an Arc Using a Start Point, a Center Point, and an Endpoint 
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Click    .  Find .  Find
- Specify a start point. 
- Specify the center point. 
- Specify the endpoint. 
Continue an Arc with a Tangential Line 
- Complete the arc. 
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Click   .  Find .  Find
- Press Enter at the first prompt. 
- Enter the length of the line and press Enter. 
Continue an Arc with a Tangential Arc 
- Complete the arc. 
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Click    .  Find .  Find
- Specify the second endpoint of the tangent arc.