Steps are given to determine the centre of curvature at a given point on an Ellipse. Arrange the steps. Let P be the given point on the conic and F and F1 are the foci. i. Produce F1G to H so that GH = VF. Join H with F. ii. Then O is the required centre of curvature. iii. Draw a line GO parallel to HF and intersecting the axis at O. iv. Draw a line F1G inclines to the axis and equal to VF1.

Steps are given to determine the centre of curvature at a given point on an Ellipse. Arrange the steps. Let P be the given point on the conic and F and F1 are the foci. i. Produce F1G to H so that GH = VF. Join H with F. ii. Then O is the required centre of curvature. iii. Draw a line GO parallel to HF and intersecting the axis at O. iv. Draw a line F1G inclines to the axis and equal to VF1. Correct Answer iv, i, iii, ii

First we just took the arbitrary line passing through one of the foci and then extended up to the length from that focus to opposite vertex and then extended further up to the length of the distance between the vertex and respective focus. Drawing parallel lines on to the focus gave us O.
Bissoy MCQ

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