Here, in this post, you'll read the rest topics from Geometric Constructions below... (6) To divide a circle. (7) To trisect (Divide into three equal parts) an angle. (8) To draw an arc with a given radius. (9) To draw tangent and normal. (10) To draw continuous curve. (11) To construct an ogee or reverse curve. (12) To draw a loop of three (3) circles pattern. Now we'll discuss them one by one... (6) How to divide a circle into 8 or 12 numbers of equal sectors. (i) A circle is divided into 8 numbers of equal sectors: Let's consider a circle with any convenient radius. As the total angle inside a circle is 360° and there are a total of 4 quadrants in a circle, so each quadrant should be of (360°/4 )= 90° (See figure below). Now, the number of divisions should be equal to 8. So each sector should be of 45° (i.e. 360°/8=45°). 1. Draw a circle with any convenient length of radius and draw its axis lines AB & CD (See above image). * Axis lines (one pair of imaginary line