Challenge 3: Why Drawing a Perfect Circle With the Pen Tool Is Unnecessarily Hard — Solution Walkthrough

The answer:

A perfect circle drawn by hand with the Pen tool requires placing four
smooth points at precise positions with carefully matched handle
lengths on every point, so all four curved segments line up into a
mathematically round shape — a genuinely fiddly, error-prone process
to get exactly right by eye.

Why the Ellipse tool avoids all of this:

Per this chapter's own material, holding Shift while dragging the
Ellipse tool constrains it to a perfect circle directly, producing the
same mathematically exact result the Pen-tool approach was straining
to achieve, in a single drag with no manual handle-matching involved
at all.

Why this connects to Chapter 3's own forward reference:

Chapter 3 explicitly pointed here, noting that regular geometric
shapes don't need to be drawn point by point with the Pen tool. A
perfect circle is exactly this kind of regular shape — reaching for
the dedicated Ellipse tool instead of the Pen tool is the difference
this chapter is built around.

WHY THIS WORKS AS AN ANSWER
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This exercise checks that a perfect circle is correctly recognized as
regular geometry better suited to the Ellipse tool, rather than a
shape that requires the Pen tool's own manual point-and-handle
placement.