Drawing a Hexagon Using a Compass Some polygons can be easily laid out with a compass. Two examples are hexagons (six sides) and octagons (eight sides). To draw a hexagon, proceed as follows: 1. Draw a circle with the radius equal to one side of the hexagon, Figure 12-30. 2. Keep the same setting of the compass after drawing the circle. 3. Start at any point on the circle and draw an arc that intersects the circle. 4. Move the compass to where the arc intersected the circle and construct another arc. Work your way around until you divide the circle into six parts. 5. Connect the six intersections with lines to com- plete the hexagon. Procedure Goodheart-Willcox Publisher Figure 12-29. A protractor or framing square and straightedge may be used for polygon layouts. 3 12 500 20 7/8 521 60 30 4 12 300 12 300 90 45 5 12 300 8 25/32 219 108 54 6 12 300 6 15/16 173 120 60 7 12 300 5 25/32 144 128 4/7 64 2/7 8 12 300 4 31/32 124 135 67 1/2 9 12 300 4 3/8 109 140 70 10 12 300 3 7/8 96 144 72 12 12 300 3 7/32 80 150 75 in mm in mm Sides Tongue Body Angle (°) Polygon Layout Table Drawing an Octagon Using a Compass To draw an octagon, proceed as follows: 1. Draw a square the size of the octagon, Figure 12-31. 2. Draw diagonals across the corners of the square. 3. Set the compass to the distance from a cor- ner of the square to the intersection of the diagonals. 4. Place the compass point on each corner of the square and construct arcs. 5. Connect the points where the arcs intersect the edges of the square. Procedure Chapter 12 Measuring, Marking, and Laying Out Materials 161 Copyright Goodheart-Willcox Co., Inc.