"angle"

[ "angle", "name", [xc, yc], [xs,ys], radius, angle ]

angular dimension consisting of two radial lines, arc and label.

Right Angle

[ "angle", ".", [xc, yc], [xs,ys], radius, (-)90 ]

symbol for right angle (dot inside arc)

[  
  [ "grid", "x","y", -5,5,-4,5, 50, [10,10], [0,0] ],
  ["angle", ".", [2,-2],[3,-2],0.4,90],
  ["point", "C", [2,-2]],
  ["point", "S", [3,-2]]
]

Single Arrow Angle

[ "angle1", "name", [xc, yc], [xs,ys], radius, angle ]

version with single arrow

[  
  [ "grid", "x","y", -5,5,-4,5, 50, [10,10], [0,0] ],
  ["angle1", ".", [2,-2],[3,-2],0.4,45],
  ["point", "C", [2,-2]],
  ["point", "S", [3,-2]]
]

[ "angle2", "name", [xc, yc], [xs,ys], radius, angle ]

version with two arrows

[  
  [ "grid", "x","y", -5,5,-4,5, 50, [10,10], [0,0] ],
  ["angle2", ".", [2,-2],[3,-2],0.4,60],
  ["point", "C", [2,-2]],
  ["point", "S", [3,-2]],
  ["point", "R", [2.4,-2]]
]

• "name" label text, typeset in MathJax math mode
• [xc, yc] center point
• [xs,ys] end point of radial baseline
• angle angle in °, counterclockwise from base line.

[  
  [ "grid", "x","y", -5,5,-4,5, 50, [10,10], [0,0] ],
  ["angle", ".", [2,-2],[3,-2],0.4,90],
  ["point", "C", [2,-2]],
  ["point", "S", [3,-2]]
]