
Technical Drawing  Exam Papers  Ordinary  1993  Paper 1
Question 6
 Draw a triangle DEF in which the sides are in the ratio of 2.5 : 3 : 4 and the longest side DE is 86 mm.
In this triangle DE is the directrix of a parabola and F is the focus. Draw a portion of the parabola.
 In the quadrilateral shown in Fig. 6, AD is the directrix of a parabola, B and C are points on the curve and the focus lies within the quadrilateral. Locate the focus and axis and draw a portion of the curve.
Construct a tangent to the curve from the point D.
