Question Detail
Question
When constructing a tangential curve of radius R externally to two circles of radii r1 and r2 (page 20), what radii are used for the arcs drawn from the centers A and B of the given circles to find the center O of the tangential curve?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Page 20, step 2 states: 'With centre A and radius R+r1, draw an arc' and step 3 states: 'With centre B and radius R+r2, draw an arc to intersect the first arc at O.'
Hint
Look at steps 2 and 3 under 'To Construct a Curve Tangential to Two Circles' for external tangency.