The three characteristics that are true of a cone and a cylinder are:
- They are both 3 dimensional solids.
- They both have a circular base.
- 3 cones would fit inside a cylinder with the same radius and same height.
The first characteristic correctly states that both shapes are three-dimensional. The second characteristic indicates that both have a circular base, which is true for both cones and cylinders. The third characteristic is also accurate; a cylinder with a given radius and height can hold three cones of the same dimensions due to the differences in volume between the two shapes.