The essentials of descriptive geometry . APPENDIX 199 and through the second point, G, draw the line AG. This willbe the side of the polygon adjacent to AB. Bisect AB and AGby perpendiculars meeting at 0. This point 0 will be the centerof the circumscribing circle. Draw this circle and lay off on itseven chords each equal to AB, thus locating the points C, D, E,and F. ABCDEFG,then, is the requiredpolygon of seven sides. To draw a tangentto a circle from a givenpoint without the cir-cumference. Let MANB be thegiven circle whose cen-ter is at O, and let Pbe the given point from which the tangent
The essentials of descriptive geometry . APPENDIX 199 and through the second point, G, draw the line AG. This willbe the side of the polygon adjacent to AB. Bisect AB and AGby perpendiculars meeting at 0. This point 0 will be the centerof the circumscribing circle. Draw this circle and lay off on itseven chords each equal to AB, thus locating the points C, D, E,and F. ABCDEFG,then, is the requiredpolygon of seven sides. To draw a tangentto a circle from a givenpoint without the cir-cumference. Let MANB be thegiven circle whose cen-ter is at O, and let Pbe the given point from which the tangent is to be drawn. DrawOP and upon OP as a diameter describe the circle OABP cuttingthe given circle at the points A and B. Draw PA and PB; thesewiU be the required tangents from P and A and B will be thetangent
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