131) The section obtained when the section plane makes a smaller angle with its axis than that of the angle made by the generator of a cone is called ……………………
134) The polyhedral having two equal and similar end bases, parallel to each other and are joined by other faces which may be rectangles or parallelograms is called……….
138) When a pyramid or cone is cut by a cutting plane parallel to its base the remaining portion thus obtained after removing the top portion is called …….