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Technical Drawing  Exam Papers  Ordinary  2007  Paper 1Question 4Below is shown a circle R and a semicircle S, which are in contact with the line AB as shown. Also shown are two points P and Q on the circumference of the circle and the semicircle respectively. (a) The circle R rolls clockwise
along the line AB until P
reaches the line AB. (b) The semicircle S rolls
anticlockwise along the line AB
until Q reaches the line AB. 


