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






Question 2

 

(ii)                          State the length of the side of the heptagon.

  1. (i)         Construct a similar heptagon whose area is 1.6 times the area of

the given heptagon.

  1. State the length of the side of the enlarged heptagon.

 

 


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OBSERVATION


  Candidates were expected:

  1. know that a heptagon is seven sided;
  2. interprete the ratio 1.6:1 as enlargement;
  3. draw the circle diameter;
  4. divide the diameter of the circle into 7 equal                                                parts;
  5. draw the arcs R70 from both ends of the diameter of the circle to intercept at point N;
  6. draw a line from N through 21 to touch the circle at                     S;
  7. step RS round the circle to obtain the remaining sides of the heptagon;
  8. get the length of the original side to be 30±1;
  9. get the length of the enlarged side to be 38±1.

 

 

 

   

 

 

 

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