## Circle

The Circle tool lets you construct a circle in three different ways. You can define the center first and then a circumference point You can define a circumference point first and then the center or you can define the circle with two opposite circumference points. You use the second Option Button to control this construction method. The third option button allows you to constrain the second point so that it’s perfectly horizontally aligned or vertically aligned with the first or so that it positioned along a vector you define using the Mark Button. [Read More]

## Circle Arc

The Circle Arc tool allows you to create these types of shapes: You first need to define the circle on which the shape will be based. For that you used the second Option Button to choose: Center to circumference point Circumference point to center Circumference point to opposite circumference point You use the Mark Button to define the second point (based on your selection above). [Read More]

## Circle by Tangents

The Circle by Tangents tools allows you to construct a Circle that is tangent to two line lines that you define. Here’s an example: The Line Segments in the image above were there before the circle was constructed, but you could use any four points to define the tangent lines. There are no construction options for this tool, only the Mark Button which is used to define the two tangents lines. [Read More]

The Inscribe/Circumscribe Circle tool either inscribes a circle in a triangle or circumscribes a circle about a triangle. This tool can only be applied to triangles. You toggle between inscribed and circumscribed using the second Option Button. There is one thing you should note though about the effect of Paint Attributes though. If the triangle you’re inscribing/circumscribing has a thick stroke width, the circle may overlap the corners or interior of the triangle. [Read More]

## Circular Ring

The Circular Ring tool is similar to the Circle tool except that instead of a circle, it creates a circle with a circular hole in the middle, that is, a ring. This means that you have to define not one radius but two. The second Option Button sets the construction method. These construction methods are identical to those for the Circle tool except that after you’ve set the initial radius, the second radius is set by moving your finger either further outward (to create the outer radius) or further inward (to create the inner radius). [Read More]

## Circular Ring Sector

The Circular Ring Sector tool lets you create a pie sliced portion of a Circular Ring like this: You select the center first and then drag outward to define the first radius of the sector and mark it with the Mark Button. You can constrain the location of this circumference point using the Drag Constraint button so that it is aligned with the center point either horizontally, vertically, or along a vector. [Read More]

## Dual Elliptical Ring

The Dual Elliptical Ring tool is similar to the Elliptical Ring tool except that the inner and outer ellipses do not have to be the same shape. Here’s an example. The first ellipse (which can be either the inner ellipse or the outer ellipse) is defined in exactly the same way as the initial ellipse in an Elliptical Ring. You define the bounding rectangle of the ellipse using one of these construction methods: Select the center first and then one of the corners of the bounding rectangle Select the opposite corners of the bounding rectangle Select one of the corners of the bounding rectangle and then the center Select the horizontal axis of the ellipse and then one of the corners of its bounding rectangle Select the vertical axis of the ellipse and then one of the corners of the bounding rectangle Select the center of the ellipse, the end of its horizontal axis (using the mark button), and then one of the corners of the bounding rectangle Select the center of the ellipse, the end of its vertical axis (mark button), and then one of the corners of the bounding rectangle [Read More]

## Ellipse

The Ellipse tool lets you to construct an ellipse in several different ways. The first Option Button determines the construction method: Select the center first and then one of the corners of the bounding rectangle Select the opposite corners of the bounding rectangle Select one of the corners of the bounding rectangle and then the center Select the horizontal axis of the ellipse and then one of the corners of its bounding rectangle Select the vertical axis of the ellipse and then one of the corners of the bounding rectangle Select the center of the ellipse, the end of its horizontal axis (using the mark button), and then one of the corners of the bounding rectangle Select the center of the ellipse, the end of its vertical axis (mark button), and then one of the corners of the bounding rectangle [Read More]

## Ellipse Arc

The Ellipse Arc tool allows you to create these types of shapes: You first need to define the bounding rectangle on which the ellipse will be based. For that you used the second Option Button: Select the center first and then one of the corners of the bounding rectangle Select the opposite corners of the bounding rectangle Select one of the corners of the bounding rectangle and then the center Select the horizontal axis of the ellipse and then one of the corners of its bounding rectangle Select the vertical axis of the ellipse and then one of the corners of the bounding rectangle Select the center of the ellipse, the end of its horizontal axis (using the mark button), and then one of the corners of the bounding rectangle Select the center of the ellipse, the end of its vertical axis (mark button), and then one of the corners of the bounding rectangle After you’ve defined the ellipse, you then need to define the “sweep” of the arc, that is, the start angle and the end angle. [Read More]

## Elliptical Ring

The Elliptical Ring tool is similar to the Ellipse tool except that instead of an ellipse, it creates an ellipse with an elliptical hole in the middle. This means that you have to define not only the bounding rectangle of the ellipse but also the inner (or outer) radius of the ring. The construction methods for the initial ellipse are identical to those of an Ellipse: Select the center first and then one of the corners of the bounding rectangle Select the opposite corners of the bounding rectangle Select one of the corners of the bounding rectangle and then the center Select the horizontal axis of the ellipse and then one of the corners of its bounding rectangle Select the vertical axis of the ellipse and then one of the corners of the bounding rectangle Select the center of the ellipse, the end of its horizontal axis (using the mark button), and then one of the corners of the bounding rectangle Select the center of the ellipse, the end of its vertical axis (mark button), and then one of the corners of the bounding rectangle [Read More]