Answer:
It is a sphere with center T and radius 8.5 inches ⇒ answer D
Explanation:
* Lets explain the difference between the circle and the sphere
- A circle is a closed curve formed from the set of all points in a plane
that are equidistant from a given point
- This distance is the radius of the circle, and the given point is
called the center of the circle
- A circle is a 2-dimensional figure, and the two dimensional does not
contain the set of all points in the 3-dimensional plane
- A sphere is a round geometrical object in three-dimensional space
- A sphere is defined as the set of all points that are equidistant from
a given point, in the three-dimensional space.
- This distance is the radius of the sphere, and the given point is called
the center of the sphere
* Lets solve the problem
- The collection of all points in the same plane that are 8.5 inches
from point T
∵ The definition of the sphere is the set of all points that are
equidistant from a given point, in the three-dimensional space
∴ It is a sphere with center T and radius 8.5 inches