Question

In the general method of drawing an ellipse, after parting the line joining the directrix and the focus, a _____ is made.

(a) Tangent

(b) Vertex

(c) Perpendicular bisector

(d) Normal

This question was addressed to me during an interview for a job.

My doubt stems from Construction of Ellipse topic in division Geometrical Construction of Engineering Drawing

Answer 1

Right answer is (b) Vertex

To explain: In the general method of drawing after parting the line joining the directrix and the focus, a vertex is made. An arc with a radius equal to the length between the vertex and the focus is drawn with the vertex as the centre.