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F A B C V E 1 1’ Given CF=65mm Given, eccentricity=3/4. Therefore divide CF in 7 equal parts and mark V at 3rd division from F Draw an ellipse by general method, given distance of focus from directrix 65mm and eccentricity ¾.

Ellipse by Gen Method(Thedirectdata.com)

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Page 1: Ellipse by Gen Method(Thedirectdata.com)

F

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Given CF=65mm

Given, eccentricity=3/4. Therefore divide CF in 7 equal parts and mark V at 3rd division from F

Draw an ellipse by general method, given distance of focus from directrix 65mm and eccentricity ¾.

Page 2: Ellipse by Gen Method(Thedirectdata.com)

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ef

a’b’ f’

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b’ f’

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45°

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f1 e1

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60°

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PROBLEM

A regular hexagon of 40mm side has a corner in the HP. Its surface inclined at45° to the HP and the top view of the diagonal through the corner which is in the HP makes an angle of 60° with the VP. Draw its projections.

Plane parallel to HPPlane inclined to HP at 45°and ┴ to VP

Top view of the diagonal making 60° with the VP.

YX

Page 3: Ellipse by Gen Method(Thedirectdata.com)

P1

1’

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3’4’

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8’10’

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P2

P3P4

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Page 4: Ellipse by Gen Method(Thedirectdata.com)

PROBLEM: A point moves in a plane in such a way that its distance from a fixed point is equal to its distance from a fixed line. The distance between fixed point and the fixed line is 65 mm.

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