Create circles in a sketch

Learn how to use the Center Diameter Circle, 2-Point Circle, 3-Point Circle, 2-Tangent Circle, and 3-Tangent Circle tools to create different types of circles in an active sketch in Fusion.

Center Diameter Circle

Create a circle by placing the center point and specifying the diameter to define the position and size of the circle.

1. On the Sketch contextual tab, select Create > Circle > Center Diameter Circle .
2. In the canvas, click to place the center point of the circle.
3. Specify the diameter value, then click to place the circle.
4. Optional: Repeat steps 2-3 to create another circle.
5. Press Enter to complete the tool.

The circles, and any construction geometry, constraints, and dimensions that are added to them, display in the canvas.

2-Point Circle

Create a circle by placing 2 points on either end of the the diameter to define the position and size of the circle.

1. On the Sketch contextual tab, select Create > Circle > 2-Point Circle .
2. In the canvas, click to place the first point of the diameter.
3. Specify the diameter of the circle:
   • Click a second point to place the circle.
   • Or specify the diameter value, then click to place the circle.
4. Optional: Repeat steps 2-3 to create another circle.
5. Press Enter to complete the tool.

The circles, and any construction geometry, constraints, and dimensions that are added to them, display in the canvas.

3-Point Circle

Create a circle by placing 3 points that lie on the circumference to define the position and size of the circle.

1. On the Sketch contextual tab, select Create > Circle > 3-Point Circle .
2. In the canvas, click to place the first point that lies on on the circumference.
3. Click to place a second point that lies on the circumference.
4. Click to place a third point that lies on the circumference.
5. Optional: Repeat steps 2-4 to create another circle.
6. Press Enter to complete the tool.

The circles, and any construction geometry, constraints, and dimensions that are added to them, display in the canvas.

2-Tangent Circle

Create a circle by selecting 2 lines and specifying the radius to define the position and size of the circle so that it maintains tangency with the selected sketch geometry.

1. On the Sketch contextual tab, select Create > Circle > 2-Tangent Circle .
2. In the canvas, select 2 lines to create a circle that is tangent to them.
3. Specify the radius of the circle:
   • Click a point to place the circle.
   • Or specify the radius value, then click to place the circle.
4. Optional: Repeat steps 2-3 to create another circle.
5. Press Enter to complete the tool.

The circles, and any construction geometry, constraints, and dimensions that are added to them, display in the canvas.

3-Tangent Circle

Create a circle by selecting 3 lines to define the position and size of the circle so that it maintains tangency with the selected sketch geometry.

1. On the Sketch contextual tab, select Create > Circle > 3-Tangent Circle .
2. In the canvas, select 3 lines to create a circle that is tangent to them.
3. Optional: Repeat steps 2 to create another circle.
4. Press Enter to complete the tool.

The circles, and any construction geometry, constraints, and dimensions that are added to them, display in the canvas.

Tips

• In the Sketch Palette dialog, in the Feature Options section, you can switch between Circle types while any circle tool is active.
• As you move the mouse cursor, object snap symbols display near the geometry when you snap to the sketch grid or other geometry in the design. If you snap to a specific point, the logical constraints are automatically added to the sketch.
• Use the Center Diameter Circle to create a circle when you know the size and location of the circle. You can use construction geometry and snap points to place the center of the circle.