Tangency, ContinuedTo drawtangents to twocirclesTo draw tangents to two circles, follow this table:StepAction1Given two circles with centers marked C1 and C2, move a triangleor straightedge to connect the centerlines.2Place a triangle at the upper arcs of the circles until one side of thetriangle touches both circles C1 and C2.Draw a line tangent to thecircles.3Draw a perpendicular line from the points of tangency to thecenterlines of the circles.4Repeat this procedure for the bottom arcs of the two circles.Figure 2-28 shows how to draw tangents to two circles.Figure 2-28.—Drawing tangents to two circles.Continued on next page2-29
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