Bevel join. The two segments are finished with butt caps and the resulting notch beyond the ends of the segments is filled with a triangle.
Miter join. The outer edges of the strokes for the two segments are extended until they meet at an angle, as in a picture frame.
Round join. An arc of a circle with a diameter equal to the line width is drawn around the point where the two segments meet, connecting the outer edges of the strokes for the two segments.
Description
Line join style enumeration.
Example