def p1():
    p1 = Polygon([Point('A', 0.5, 0.5),
                  Point('B', 3, 1),
                  Point('C', 3.2, 4),
                  Point('D', 0.8, 3)
                  ])
    p1.side[0].label = Value(4, unit='cm')
    p1.side[1].label = Value(3, unit='cm')
    p1.side[2].label = Value(2, unit='cm')
    p1.side[3].label = Value(6.5, unit='cm')
    p1.angle[0].label = Value(64, unit="\\textdegree")
    p1.angle[1].label = Value(128, unit="\\textdegree")
    p1.angle[2].label = Value(32, unit="\\textdegree")
    p1.angle[3].label = Value(256, unit="\\textdegree")
    p1.angle[0].mark = 'simple'
    p1.angle[1].mark = 'simple'
    p1.angle[2].mark = 'simple'
    p1.angle[3].mark = 'simple'
    return p1