Answer:
Circle will be formed on slicing the cone parallel to the base.
Explanation:
The shape of the cross-section that is obtained on slicing a cone parallel to the base of a cone is:
Circle.
( Since, when the slicing is done parallel to the base the cross-section that is obtained is similar to the base of the figure.
As the base of a cone is in the shape of a circle.
Hence, the cross-section that is obtained is in the shape of a circle. )