Figure below represents a section (shaded) obtained due to intersection by a plane that is parallel to the axes of the cones, what it the section called?

Parabolic curves is not used in ________

The sections cut by a plane on a right circular cone are called as ______

While cutting, if the plane is at an angle and it cuts all the generators, then the conic formed is called as ______

When the plane cuts the cone at angle parallel to the axis of the cone, then _____ is formed.

The ratio of the distance from the focus to the distance from the directrix is called as eccentricity.

If the distance from the focus is 10 units and the distance from the directrix is 30 units, then what is the eccentricity?

If the distance from a fixed straight line is 5mm and the distance from a fixed point is 14mm then what is the value of eccentricity?

The curve which has eccentricity zero is _______

Choose the correct option.

Which of the following constructions doesn’t use elliptical curves?

The surface generated when a rectangle is rotated about one of its side is

The surface generated when a right angled triangle is rotated about its side which is perpendicular to the base is

Arcs of circle are dimensioned by their