Three students attempt to define what a circle is. Can you match the teacher's comments to the
definitions?
Definition of a circle
Teacher's comments
Duru's definition: The set
of all points in a plane that
are the same distance away
from some given point,
which we call the center.
You seem to be
confusing a circle with
a sphere.
Oliver's definition: The set
of all points in 3D space that
are the same distance from
a center point.
Stupendous! Well
done.
Carlos's definition: A
perfectly round shape.
Your definition needs
to be much more
precise.