Answer:
True
Explanation:
The horizontal cross sections are orthogonal (perpendicular) projections of the base. Then they are parallel to their bases and congruent. Check some below, the "slices" (circles) with the same radius and circumferences.
True
P.S.
There are some misconceptions due to the ambiguity of the comprehension of cylinder x cylindrical surface.
In College Geometry this definition of a cylinder is enlarged, and the cylinder gains a new definition which redefines it as a section of a cone with a infinite height. But a cylinder does not have an apex. Cone and pyramids do. A cylinder has an axis.