Isometric Circles Circles in isometric don't appear circular. Instead they are skewed and are actually elliptical. There are several methods of constructing circles in isometric. 1. First draw an isometric square. Draw in the diagonals, a vertical and a line at 30 degrees from the midpoint of the sides as illustrated. 2. Place your compass point on the intersection of the horizontal line and the vertical line. Draw in a circle which touches the edges of the box 3. To draw the next section of the isometric 4. Complete the circle using the appropriate circle place your compass point on the corner techniques. of the isometric 'square' and draw in the arc as illustrated.