ENGINEERING GRAPHICS

UNIT 2

1. Draw ellipse by concentric circle method. Take major axis 100 mm and

minor axis 70 mm long.

Steps:

1. Draw both axes as perpendicular bisectors of each other & name their ends as

shown.

2. Taking their intersecting point as a center, draw two concentric circles

considering both as respective diameters.

3. Divide both circles in 12 equal parts & name as shown.

4. From all points of outer circle draw vertical lines downwards and upwards

respectively.

5. From all points of inner circle draw horizontal lines to intersect those vertical

lines.

6. Mark all intersecting points properly as those are the points on ellipse.

7. Join all these points along with the ends of both axes in smooth possible curve. It

is required ellipse.