waecE-LEARNING
Technical Drawing Paper 1, May/June 2012  
Questions: 1 2 3 4 Main
General Comments
Strength
Weakness/Remedies






Question 4

 

 

. An ellipse has a major axis 120 and minor axis 80.

  1. (i) Determine by construction the positions of the two foci and state the distance between them.
  2. Use the foci method to construct the ellipse in full size.
  3. (i) Construct a tangent to the ellipse at a point 30 above the major axis and to the left of the minor axis .
  4. Determine and state the distance of the tangent point from the two foci.


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OBSERVATION


Candidates were expected to:

  1. draw the major and minor axes at right angle to each     other;
  2. be able to construct the tangent and the normal to it;
  3. know how to locate focal points;
  4. be able to use the focal points to construct a tangent and     a normal to the ellipse.

image28The solution is shown below

 

 

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