2.1.1384 Part 4 Section, round (Round Line Join)

a.   The standard states that line joins will be round.

In Office, the following preset shapes (“[ECMA-376] Part 4 §; ST_ShapeType (Preset Shape Types)”) will use a mitered line join (“[ECMA-376] Part 4 §; miter (Miter Line Join)”) even if round is specified:

cube, moon, chevron, ellipseRibbon, ellipseRibbon2, plus, rightArrow, stripedRightArrow, notchedRightArrow, leftArrowCallout, leftRightArrowCallout, upDownArrowCallout, quadArrowCallout, star4, star5, star8, star10, star12, star16, star24, star32, upArrow, downArrow, upDownArrow, leftUpArrow, bentUpArrow, mathPlus, mathMinus, mathMultiply, mathEqual, mathNotEqual