Apple Newton Programmer’s Newton 2.0 (for Newton 2.0) - Manual (Page 530)

C H A P T E R 1 3
Drawing and Graphics
13-4 About Drawing
Drawing also provides functions that allow you to perform a variety of mathematical
calculations on rectangles—changing their sizes, shifting them around, and so on.
An oval is a circular or elliptical shape defined by the bounding rectangle that
encloses it. If the bounding rectangle is a square (that is, has equal width and
height), the oval is a circle, as shown in Figure 13-3.
Figure 13-3 An oval
An arc is a portion of the circumference of an oval bounded by a pair of radii
joining at the oval’s center; a wedge includes part of the oval’s interior. Arcs and
wedges are defined by the bounding rectangle that encloses the oval, along with a
pair of angles marking the positions of the bounding radii, as shown in Figure 13-4.
Figure 13-4 An arc and a wedge
Oval
Bounding
rectangle
Bounding
rectangle Bounding
rectangle
An arc A wedge
Bounding
radius Bounding
radius