The base of a right circular cone is ________ .
A pyramid is a solid figure,whose base is
(a) only a triangle
(b) only a square
(c) only a rectangle
(d) any polygon
In a right circular cone, the cross section made by a plane parallel to the base is a
(a) sphere (b) hemisphere (c) circle (d) a semicircle
Vertical cross-section of a right circular cylinder is always a
(a) square (b) rectangle
(c) rhombus (d) trapezium