The Shape Nodes palette has shapes like trapezoidal, parallellogram, triangle, etc.
It is a tempting to customize their appearance:
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Change the aspect ratio of a triangle (= Height / Base)
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Tilt the traingle
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Change the angle of the parallellogram/trapezoid
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Change the angular sides of the octagon.
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etc
See the sample customizations given below (created in LibreOffice)
Can this be possible in yEd Editor?