Tangency, ContinuedTo draw an arcTo draw an arc tangent to two arcs, follow this table:tangent to twoarcsStepAction1Given arcs with centers A and B, and a required radius R, draw arcsparallel to the given arcs and at a distance that equals R.2Label the intersection of these arcs C since this is the center of therequired tangent arc.3Draw lines from the centers A and B to C to locate points oftangency T.4Draw the required arc with a radius of R to the points of tangency.Figure 2-31 shows the process of drawing a tangent arc to two arcs.Figure 2-31.—Drawing an arctangent to two arcs.Clearly this section does not cover all situations of tangency but shows thatthe problems have mathematical solutions.Refer to texts in basic drafting formore complete coverage of tangential problem solving.2-32
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